1976.
NASA's Viking 1 and Viking 2 landed on Mars in 1976.
viking 1 and viking 2
The two VIKING probes arrived in Mars orbit in 1976 when they started sending photographs back to Earth. The two orbiters continued sending photographs and the landers conducted experiments on the planet's surface until they failed as follows:Viking 2 Orbiter: July 1978 Viking 2 Lander: April 1980 Viking 1 Orbiter: August 1980 Viking 1 Lander: November 1982.
Mariner 9, Mariner5, Viking 1 and Viking 2
The first man made probes to successfully land on the surface of Mars were two Soviet probes; Mars 2 on November 27 and Mars 3 on December 2, 1971, but both ceased communicating within seconds of landing. The NASA Viking program had two landers; Viking 1 remained operational for six years, Viking 2 for three years after their 1976 landing.
Viking 1 was launched on August 20, 1975, and the second craft, Viking 2, was launched on September 9, 1975. Viking 1 entered Mars orbit on June 19, 1976. The Viking 1 touched down on the surface of Mars on July 20, 1976, and was joined by the Viking 2 on September 3.
It was Mars 2, from the Soviet Mars Lander Program.
Mars had a spacecraft land on it in 1976. NASA's Viking 1 lander successfully landed on Mars on July 20, 1976, followed by its companion, Viking 2, a few weeks later. This marked the first successful landing of a spacecraft on Mars.
The viking rovers, vikings I and II.
Viking Lander 1 and Viking Lander 2 Yes, but there are more than that.
The Viking 1 and Viking 2 missions consisted of both an orbiter and a lander. The landers successfully touched down on the surface of Mars, while the orbiters remained in Mars' orbit to relay communications and data between the landers and Earth.
Nothing of significance. Viking 1 and Viking 2 landed in 1976 and after that there were no Mars missions until 1988.