"every odd number is the difference of two consecutive squares. Square Root Day Square Root Day is an unofficial holiday celebrated on days when both the day of the month and the month are the square root of the last two digits of the year. For example, the last Square Root Day was April 4, 2016 (4/4/16), and the next Square Root Day will be May 5, 2025 (5/5/25). The final Square Root Day of the century will occur on September 9, 2081. Square Root Days fall upon the same nine dates each century. Ron Gordon, a Redwood City, California"
"Jagdstaffel 81 Royal Prussian Jagdstaffel 81, commonly abbreviated to Jasta 81, was a ""hunting group"" (i.e., fighter squadron) of the ""Luftstreitkräfte"", the air arm of the Imperial German Army during World War I. The squadron would score six or more aerial victories during July/August 1917, while serving on the Eastern Front. After switching to the Western Front, Jasta 81 would score another 35 victories from May 1918 to war's end. The unit's victories came at the expense of five killed in action, three killed in flying accidents, one injured in a flying accident, three wounded in action, and three taken"
"No. 81 Squadron RAF No 81 Squadron was a squadron of the Royal Air Force. It flew Fighter aircraft during the Second World War, and reconnaissance aircraft in the Far East after the war and was disbanded in 1970. No. 81 Squadron Royal Flying Corps was formed on 7 January 1917 at Gosport as a training unit, but unlike many other Training squadrons during the First World War, it was not mobilised for active service and was disbanded on 4 July 1918. The squadron reformed 25 November 1918 with all Canadian personnel and was officially known as No. 1 Squadron,"
"VFA-81 Strike Fighter Squadron 81 (VFA-81), also known as the ""Sunliners"", is a United States Navy F/A-18E Super Hornet strike fighter squadron stationed at Naval Air Station Oceana. They are a part of Carrier Air Wing One, their radio callsign is ""Inferno"", and their tail code is ""AB"". Their mission is to conduct prompt and sustained combat operations from the sea. The squadron was originally designated VA-66 on 1 July 1955, was redesignated VF-81 the same day, redesignated VA-81 on 1 July 1959, and finally redesignated VFA-81 on 4 February 1988. The squadron was originally called ""Crusaders"" and their first"
"81a Squadriglia 81a Squadriglia was an Italian fighter squadron raised in March 1917 that served through the end of World War I. One of its aces, Flavio Baracchini, would become the first awardee of the Gold Medal for Military Valor. The squadron would be credited with 34 aerial victories, and suffer four dead. It ended the war with 28 aircraft on strength. ""81a Squadriglia"" of the ""Corpo Aeronautico Militare"" was founded at the Central Flying School in Arcade, Italy in March 1917, during World War I. In April 1917, it deployed to operate Nieuport 11 fighters, and was attached to"
"81st Group Army The 81st Group Army, formerly the 65th Group Army, is a military formation of China's People's Liberation Army and one of three active group armies belonging to the Beijing Military Region. It is based in Zhangjiakou, Hebei and is composed of the 193rd Division, an artillery division, an armored brigade, two motorized infantry brigades, and an anti-aircraft artillery brigade. Its unit ID number is 66455. The 65th Group Army traces its lineage to its original incarnation, the 5th Column of the North China Field Army established sometime around 1946. It was initially composed of three brigades, the"
"on the range in the Kisatchie National Forest, while gunnery training was accomplished in Army Air Forces schools at Panama City, Florida, and Las Vegas, Nevada. The squadron also participated in general field operations training near DeRidder, Louisiana. In late the 81st served as part of a detachment force of 40 aircraft and 450 officers and men that was sent to Stockton, California, for over-water training. In June 1942 the squadron began its movement overseas. The air echelon staged at Morrison Field, Florida. On 14 July it flew to Accra, British West Africa then on to Khartoum in Anglo-Egyptian Sudan,"
"January 1942, at Key Field, Mississippi, as the 81st Pursuit Squadron flying the P-40 Warhawk. The squadron was assigned to the 50th Fighter Group to replace the 11th Pursuit Squadron, which had been transferred after the Japanese attack on Pearl Harbor to reinforce the air defenses of Alaska. In May 1942 the 50th Group was assigned to the Fighter Command School of the Army Air Forces School of Applied Tactics and the 81st became the 81st Fighter Squadron (Special). Night fighter combat over the skies of England made the Army Air Forces aware of the need for night air defense"
"to Diego Garcia in 2001–02, when they provided local air defence, to Iraq in 2003, when they saw action flying fighter escort and close air support missions in concert with Coalition forces, and to the Middle East in 2015–16, when they undertook strike operations during the military intervention against ISIL. They have also been employed to patrol high-profile events in Australia, including the Commonwealth Games and visits by foreign dignitaries. Formed in April 1944, No. 81 Wing comprised three flying units, Nos. 76, 77 and 82 Squadrons, operating P-40 Kittyhawk fighters in the South West Pacific theatre of World War"
"support of Operation Inherent Resolve and returned to NAS Oceana in late summer 2018. VFA-81 Strike Fighter Squadron 81 (VFA-81), also known as the ""Sunliners"", is a United States Navy F/A-18E Super Hornet strike fighter squadron stationed at Naval Air Station Oceana. They are a part of Carrier Air Wing One, their radio callsign is ""Inferno"", and their tail code is ""AB"". Their mission is to conduct prompt and sustained combat operations from the sea. The squadron was originally designated VA-66 on 1 July 1955, was redesignated VF-81 the same day, redesignated VA-81 on 1 July 1959, and finally redesignated"
"in the ""Massa da Caccia"" (Fighter Mass) that supported the victorious final Italian offensive at Vittorio Veneto. When the war in northern Italy ended on 3 November 1918, the ""81a Squadriglia"" had flown 4,118 combat sorties, engaged the enemy 230 times, and were credited with 34 aerial victories. The squadron suffered four dead. It still had 21 Hanriots and a Nieuport 27 in service. Flying ace Flavio Baracchini scored 13 of his 21 accredited victories with ""81a Squadriglia"". Other aces who scored victories while with the squadron were Gastone Novelli and Alessandro Buzio. 81a Squadriglia 81a Squadriglia was an Italian"
"out; the unit began flying missions over Korea a week later. In January 1961, No. 81 Wing was re-established at RAAF Base Williamtown, New South Wales. Flying CAC Sabres, its complement included Nos. 75 and 76 Squadrons, as well as No. 2 Operational Conversion Unit (No. 2 OCU) and a re-formed No. 481 Squadron. In September 1964, Nos. 76 and 481 Squadrons deployed to RAAF Base Darwin, Northern Territory, as part of Operation Handover, a little-publicised contingency plan put into effect during the ""Konfrontasi"" between Indonesia and Malaysia. No. 76 Squadron's Sabres, armed with Sidewinder missiles, were to defend against"
"troop concentrations. After rebasing to Foggia Main, Italy, on 10 November the squadron increased the range of its bombing missions to include Yugoslavia. Prior to the end of January 1944 it participated in 10 raids on harbor and dock facilities along the Yugoslavian Adriatic Coast, at Zadar, Split, and Šibenik. In addition, the squadron flew a mission against the Mostar Main Airdrome in Yugoslavia and another directed at the Eleusis Airdrome in Greece. The 81st Bombardment Squadron's final Italian Campaign mission took place on 30 January 1944 in an intended attack upon a road junction near Rome. A cloud covering"
"81st Pioneers became the 10th (Training) Battalion, 1st Madras Pioneers. This regiment was disbanded in 1933. 81st Pioneers The 81st Pioneers were an infantry regiment of the British Indian Army. They could trace their origins to 1786, when they were raised as the 28th Madras Battalion. The regiment was first called into action for the campaigns in the Third Anglo-Mysore War. They then took part in the Battle of Seringapatam in the Fourth Anglo-Mysore War. Next they were involved in the Third Anglo-Maratha War, where they fought at the Battle of Nagpore in 1817. In 1879 they were involved in"
"81st Fighter Squadron The 81st Fighter Squadron is a flying squadron of the United States Air Force. It is Geographically Separated Unit of the 14th Flying Training Wing at Columbus Air Force Base, Mississippi, and operates the A-29 Super Tucano aircraft conducting close air support training to the Afghan Air Force as part of ISAF. It is stationed at Moody Air Force Base, Georgia. Provide the Supreme Headquarters Allied Powers Europe and United States Air Forces in Europe commanders with dedicated close air support, air strike control, and combat search and rescue capability. The squadron was first activated on 15"
"81 Group at the end of December 1940 and disbanded in early October 1943 when it was redesignated No. 2 Combat Training Wing (changed again to No. 2 Tactical Exercise Unit at a later date). In the event of a German invasion the OTU would have become No. 558 Squadron (and later also as No. 563 Squadron) to operate from RAF Turnhouse. The unit reformed on 15 March 1945, at RAF Poulton in No. 12 Group, as half an Operational Training Unit equipped with Spitfires from the day fighter element of No. 41 Operational Training Unit until it was disbanded"
"of an Army reorganization, the 81st was revived as a separate light infantry brigade on 1 January 1968 under Brigadier General Albert Kaye and built around the three battalions of the 161st Infantry Regiment. In 1971, the brigade converted to mechanized infantry, substituting one infantry battalion with 1st Battalion, 303rd Armor. In subsequent years, the brigade was consecutively ""affiliated"" with the 9th Infantry Division and 4th Infantry Division before finally becoming the ""roundout brigade"" for the 9th Division and wearing its patch instead of the separate brigade patch. In 1991, the 9th Division was deactivated and the 81st was a"
"the 81st was established at Clovis Air Force Base, New Mexico where it briefly flew the F-51 Mustang before transitioning to the F-86 Sabre in the spring of 1953. In August 1953, the squadron relocated to Hahn Air Base, Germany. In July 1956, the 81st moved to Toul-Rosières Air Base, France, converting to the F-100 Super Sabre in July 1958. One year later, it returned to Hahn Air Base and in December 1966, re-equipped with the F-4 Phantom II. The squadron took their Phantoms to Zweibrücken Air Base, Germany, in June 1971 to fill the vacancy left by the departure"
"the division was officially disbanded. 81st Cavalry Division (Soviet Union) The 81st Cavalry Division was a cavalry division of the Red Army that served in the first years of the Great Patriotic War. It was formed in the autumn of 1941 and served in the region south of Stalingrad while the German Army besieged that city in the autumn of 1942. During the first stages of the Soviet counteroffensive, Operation Uranus, the 81st was given a prominent role in the exploitation to the southwest, but became overextended and vulnerable to the mobile German reinforcements arriving to attempt a breakthrough to"
"81st Cavalry Division (Soviet Union) The 81st Cavalry Division was a cavalry division of the Red Army that served in the first years of the Great Patriotic War. It was formed in the autumn of 1941 and served in the region south of Stalingrad while the German Army besieged that city in the autumn of 1942. During the first stages of the Soviet counteroffensive, Operation Uranus, the 81st was given a prominent role in the exploitation to the southwest, but became overextended and vulnerable to the mobile German reinforcements arriving to attempt a breakthrough to their Sixth Army. The division"
"Unit program. The brigade contains six battalions and a Headquarters and Headquarters Company. It assumed its current organizational structure as of July 9th, 2015, when the 81st Brigade converted from a Mechanized to a Stryker Brigade and some units are attached to 2nd Infantry division which includes the 1-185 Infantry. The brigade normally conducts its annual training at the Yakima Training Center, near Yakima, Washington. The 81st Infantry Brigade was constituted as part of the 41st Infantry Division on 1 April 1917, consisting of the 161st and 162nd Infantry Regiments. The 41st deployed to France, but was designated a replacement"
"division has spent the time until surrender of Japan 15 August 1945 building a fortifications around Yūki, Ibaraki without engaging in actual combat. This article incorporates material from the article in the Japanese Wikipedia, retrieved on 20 June 2016. 81st Division (Imperial Japanese Army) The was an infantry division in the Imperial Japanese Army. Its call sign was the .It was created 4 April 1944 in Utsunomiya, simultaneously with the 44th and 86th divisions. It was a triangular division. The men of the division were drafted through Utsunomiya mobilization district, although the divisional backbone was the 51st division headquarters. The"
"81st Field Artillery Regiment The 81st Field Artillery Regiment is a field artillery regiment of the United States Army. <section begin=pershing /> The 1st Missile Battalion, 81st Artillery was formed at Fort Sill in 1963 and deployed to McCully Barracks in Wackernheim, West Germany under the 56th Field Artillery Group. The battalion moved to Wiley Barracks, Neu-Ulm in 1968 and was redesignated the 1st Battalion, 81st Field Artillery Regiment effective 1 September 1971. It was initially equipped with eight Pershing 1 missiles and in 1969 replaced these with 36 Pershing 1a missiles. Service Battery was inactivated and reformed as B"
"redesignated Fighter Squadron 81 (VF-81), an all weather fighter interceptor squadron flying the F9F-8B Cougar. Their first deployment was with CVG-17 in late 1956 aboard in response to the Suez Crisis. In 1958 VF-81 made a deployment as part of Air Task Group 181 (ATG-181) aboard to the Mediterranean Sea. In the next year VF-81 went to sea with ATG-182 to the North Atlantic aboard . On 4 March 1959 VF-81 was reequipped with the A4D-2 Skyhawk and redesignated attack squadron VA-81 on 1 July 1959. VA-81 was assigned to CVG-8 and made five deployments to the Mediterranean Sea aboard"
"squadron was re-designated as the 116th Fighter-Interceptor Squadron. The 81st was assigned to Tactical Air Command (TAC) as a replacement squadron for the group's 93d Fighter-Interceptor Squadron which was at Kirtland AFB, New Mexico performing air defense duties at the Sandia National Laboratories. It was converted from the F-51s and F-80s to F-86A Sabre jet fighters and performed transition training at Moses Lake. After only four months of training, the 81st FIG was ordered to RAF Shepherds Grove, England, to bolster NATO forces in Europe. The move was the first time in aviation history a National Guard fighter squadron would"
"81st Flying Training Wing (World War II) The 81st Flying Training Wing is an inactive United States Air Force unit. It was last assigned to the Western Flying Training Command, and was disbanded on 1 November 1945 at the Santa Ana Army Air Base, California. The squadron was a World War II Command and Control unit, its mission was to provide classification and preflight testing of aviation cadets. It was one of three such centers, the others being at Maxwell Field, Alabama and San Antonio Aviation Cadet Center, Texas. There is no lineage between the current United States Air Force"
"No. 81 Wing's operational Hornet units, No. 3 Squadron, No. 75 Squadron or No. 77 Squadron. The unit was established as No. 2 (Fighter) Operational Training Unit (No. 2 OTU) in April 1942 at Port Pirie, South Australia, and relocated to RAAF Station Mildura, Victoria, the following month. During World War II, it provided training on a wide range of aircraft, including P-40 Kittyhawks, Vultee Vengeances, Avro Ansons, CAC Boomerangs, Supermarine Spitfires and Airspeed Oxfords. Disbanded in March 1947, No. 2 OTU was re-formed at Williamtown in March 1952 in response to the demand for more highly trained pilots to"
"April, the 81st was reassigned to Moses Lake Air Force Base, Washington and transferred to ADC's Fourth Air Force, its mission changed from training for worldwide deployment under TAC to performing air defense of Eastern Washington, primarily the Hanford Nuclear Reservation. After fourteen months at now redesignated Larson Air Force Base, the 81st received movement orders to deploy to England. On 1 August 1951, the 81st flew initially into RAF Shepherds Grove, when in September transferred its headquarters to RAF Bentwaters, where the wing would be stationed for the next 40 years as part of the United States Air Forces"
"in the Chinese cities of Bhamo, Mangshih, and Wanling. With the capture of Burma in the spring of 1945, combat operations for the 81st Bombardment Squadron were greatly reduced. At its base in India the unit began transition training in Douglas A-26 Invader aircraft. Training ceased with the surrender of Japan in August 1945. The air echelon of the squadron left India on 27 September on the first leg of its journey back to the Zone of the Interior. Departure of the ground echelon was delayed, however, was delayed for three months, sailing on Christmas Eve 1945 it Karachi, India,"
"aircraft destroyed and four ""probables"", for the loss of eighteen pilots killed. No. 77 Squadron began re-equipping with North American P-51 Mustangs at Labuan in September 1945. In the wake of Japan's surrender, No. 81 Wing became part of Australia's contribution to the British Commonwealth Occupation Force (BCOF). No. 77 Squadron was the last of the wing's three flying units to deploy to Japan, arriving at Bofu, a former kamikaze base, on 21 March 1946. No. 481 (Maintenance) Squadron provided technical service for the Mustangs. Occupation duties proved uneventful, the main operational task being surveillance patrols, but units maintained an"
"81st Armor Regiment The 81st Armor Regiment currently has two active battalions, the 1st and 3rd. The 1st Battalion is assigned to the 194th Armor Brigade, Fort Benning, GA. Responsible for training enlisted armor crewmen for the US Army and US Marines on armored warfare vehicles such as the M1A1/M1A2 and Stryker platform.The 3rd Battalion is currently the Provost battalion for the Maneuver Center of Excellence, Fort Benning, GA. The 81st Armor Regiment was activated on 1 October 1941 at Fort Knox, Kentucky. In early 1942, the 81st Armor was moved to California with orders to defend against possible Japanese"
"81st Support Aviation Regiment The 81st Support Aviation Regiment (""Serbo-Croatian: 81. puk pomoćne avijacije / 83. пук помоћне авијације"") was an aviation regiment established in 1944 as 2nd Yugoslav Assault Regiment (""Serbo-Croatian: 2. jugoslovenski vazduhoplovni jurišni puk / 2. југословенски ваздухопловни јуришни пук"", Russian: 2-й Югославский штурмовой авиационный полк) formed from Yugoslav partisan aviators on training in Soviet Union. The 2nd Yugoslav Assault Regiment was formed on 15 October 1944 in Grozni, USSR, from Yugoslav partisan aviators sent on training by October 1944. It consisted from three squadrons equipped with new Il-2 ground-attack aircraft. It had 233 personal, which from"
"was disbanded by the 1964 year due the ""Drvar 2"" reorganization plan. The 677th Transport Aviation Squadron was attached 107th Support Aviation Regiment, while 891st Liaison Aviation Squadron was independent for some time. 81st Support Aviation Regiment The 81st Support Aviation Regiment (""Serbo-Croatian: 81. puk pomoćne avijacije / 83. пук помоћне авијације"") was an aviation regiment established in 1944 as 2nd Yugoslav Assault Regiment (""Serbo-Croatian: 2. jugoslovenski vazduhoplovni jurišni puk / 2. југословенски ваздухопловни јуришни пук"", Russian: 2-й Югославский штурмовой авиационный полк) formed from Yugoslav partisan aviators on training in Soviet Union. The 2nd Yugoslav Assault Regiment was formed on"