In March of 1965, this Russian cosmonaut left his spacecraft and accomplished the first “walk” in space. Who was he?

The Russian cosmonaut who accomplished the first "walk" in space in March 1965 was Alexei Leonov.

The Russian cosmonaut who accomplished the first "walk" in space in March 1965 was Alexei Leonov.

The Russian cosmonaut who accomplished the first spacewalk in March 1965 was Alexei Leonov. To find the answer to this question, you can either have prior knowledge or use various resources like books, articles, or trustworthy websites that document historic space missions and events. In this case, you could search for "the first spacewalk" or "Russian cosmonaut who walked in space" to find the name of the cosmonaut.