On the 21st of August 1968 Warsaw Pact countries completed their invasion of Czechoslovakia. Czech leader Alexander Dubček was arrested, flown to Moscow, interrogated and forced to sign the Moscow Protocols.
Luna 2 #OnThisDay
On 12th of September 1959 the USSR (Union of Soviet Socialist Republics), launched Luna 2. It was to be the first spacecraft to impact on the moon.
Lithuania Reinstates Its Independence: #OnThisDay
On 16th of February 1918 Lithuania reinstated its independence.
On 3rd of November 1957, the USSR (Union of Soviet Socialist Republics) launched a rocket containing the dog Laika in it.