The Soviet Union launches the Voskhod 1 into Earth orbit as the first spacecraft with a multi-person crew, and the first flight without pressure suits.

Voskhod 1 was the seventh crewed Soviet space flight. Flown by cosmonauts Vladimir Komarov, Konstantin Feoktistov, and Boris Yegorov, it launched 12 October 1964, and returned on the 13th. Voskhod 1 was the first human spaceflight to carry more than one crewman into orbit, the first flight without the use of spacesuits, and the first to carry either an engineer or a physician into outer space.

It also set a crewed spacecraft altitude record of 336 km (209 mi).

Voskhod 1 capsule on display, 2016
Voskhod 1 capsule on display, 2016 (Source: Wikimedia Commons)
The Soviet Union 1964 CPA 3113 stamp (3-men Space Flight of Komarov, Yegorov and Feoktistov. The three cosmonauts)
The Soviet Union 1964 CPA 3113 stamp (3-men Space Flight of Komarov, Yegorov and Feoktistov. The three cosmonauts) (Source: Wikimedia Commons)
Voskhod 1 and 2
Voskhod 1 and 2 (Source: Wikimedia Commons)

Watch: A step before spacewalking | Voskhod 1| USSR

From the SpaceFlight History channel.

Sources and further reading: Wikipedia — Voskhod 1 (CC BY-SA). Images: Wikimedia Commons.