Which number Apollo mission was the spaceflight that landed the first two men on the Moon?

The spaceflight that successfully landed the first two men on the Moon was Apollo 11. This historic mission took place on July 20, 1969, when astronauts Neil Armstrong and Edwin "Buzz" Aldrin became the first humans to set foot on the lunar surface, while Michael Collins orbited the Moon in the command module. This event marked a significant milestone in space exploration and is often regarded as one of humanity’s greatest achievements.

Apollo 10, while important for testing mission procedures, did not land on the Moon; it served as a "dress rehearsal" for the lunar landing. Apollo 12 followed Apollo 11 and was the second mission to land on the Moon, so it came after the first successful landing. Apollo 13, in turn, was intended to land on the Moon but had to abort the mission due to an in-flight emergency, which is why it did not achieve a lunar landing. Thus, Apollo 11 is unequivocally recognized as the mission that achieved the historic milestone of landing the first two men on the Moon.