Nuclear Non-Proliferation Treaty enters into force

A Pravda article by Sergei Kovalev argued that the sovereignty of a socialist country could not override the interests of the wider socialist community. It supplied a public rationale for intervention...

The U.S. mission became the first crewed flight to orbit the Moon. Soviet leaders and scientists continued a competing lunar program; the episode illustrates how technological rivalry was sustained by...

Chinese and Soviet troops clashed on the disputed island known in China as Zhenbao and in the USSR as Damansky. The confrontation reflected unresolved border claims and a widening political split;...

The automated probe launched during the Apollo 11 mission, aiming to collect lunar soil and return it to Earth. It crashed on the Moon, but the mission reveals how Baikonur and Kazakh territory...

The USSR and United States opened Strategic Arms Limitation Talks on offensive weapons and missile defenses. Détente reduced some risks of direct confrontation but prioritized superpower security...

The two governments renounced force and accepted the postwar European borders as a basis for détente. The treaty reduced confrontation between states while leaving unresolved the experiences of people...

The Nobel committee recognized Solzhenitsyn for his writing on Soviet prison camps and state repression. Soviet authorities prevented him from travelling to Stockholm; the award brought testimony...

The treaty recognized the Oder-Neisse line and committed both states to peaceful relations. The USSR supported the settlement as part of European détente; the agreement concerned borders shaped by...

The Soviet Union placed the first space station in orbit. The mission depended on highly specialized labor and infrastructure located across the Union; its public celebration sat alongside secrecy...

The treaty formalized political and military cooperation between the Soviet Union and Egypt under Anwar Sadat. Cairo pursued its own regional and postcolonial agenda; the relationship was strategic...