Human mission to Mars

A human mission to Mars has been seen in science fiction since the 1880s, and of aerospace engineering and scientific proposals since the late 1940s. 
Plans include landing on Mars for exploration at a minimum, with some thinking about exploring its moons Phobos and Deimos.
Longterm proposals have included sending settlers and starting terraforming the planet.
The exploration of Mars has been a goal of national space programs for many years with planned missions typically being stated as taking place anywhere between 10 and 30 years.
Plans for a human mission to Mars may include a small group (between two and eight astronauts) would visit Mars for a period of a few weeks or year.
Many spacecrafts have already landed on Mars and they include: Landed spacecraft on the surface of Mars: "Mars 3", "Viking 1", "Viking 2", "Mars Pathfinder" and its "Sojourner" rover, "Spirit", "Opportunity", "Phoenix", "Curiosity", "InSight", "Beagle2" and "Perseverance".
In April 2021, the Mars Oxygen ISRU Experiment was able to create oxygen in the Martian atmosphere by using carbon dioxide. Many believe this is the first step for a human mission to Mars as it will help humans create breathable oxygen.