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The Soviet Union issued an ultimatum to Lithuania demanding that the Red Army be allowed to enter the country and form a pro-Soviet government.
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Soviet ultimatum to Lithuania
1940 demand of the Soviet Union
The Soviet Union issued an ultimatum to Lithuania before midnight of 14 June 1940. The Soviets, using a formal pretext, demanded that an unspecified number of Soviet soldiers be allowed to enter the Lithuanian territory and that a new pro-Soviet government be formed. The…Source: Wikipedia (CC BY-SA)
Red Army
Soviet army and air force from 1918 to 1946
The Workers' and Peasants' Red Army, often shortened to the Red Army, was the army and air force of the Russian Soviet Republic and, from 1922, the Soviet Union. The army was established in January 1918 by a decree of the Council of People's Commissars to oppose the military…Source: Wikipedia (CC BY-SA)
Lithuanian Soviet Socialist Republic
Constituent republic of the Soviet Union (1940–1941; 1944–1990)
The Lithuanian Soviet Socialist Republic, also known as Soviet Lithuania or simply Lithuania, was de facto one of the constituent republics of the Soviet Union between 1940–1941 and 1944–1990. After 1946, its territory and borders mirrored those of today's Republic of Lithuania,…Source: Wikipedia (CC BY-SA)