Operation Barium () was a Czechoslovak resistance mission during World War II, organized by the Czechoslovak government-in-exile in cooperation with British intelligence. It involved three paratroopers—Captain , Lieutenant , and Lieutenant —who were parachuted into occupied Protectorate of Bohemia and Moravia in April 1944 to establish a clandestine network within Nazi-occupied Czechoslovakia to collect military and economic intelligence to send back to London and support the local resistance.
The Mobile Brigade was a Soviet-controlled security unit established during the Soviet occupation of Romania after World War II. It was led by NKVD colonel Alexandru Nicolschi, a key figure in the establishment of communist repression and intelligence structures in the country. This unit played a crucial role in dismantling opposition to the emerging communist regime and laying the groundwork for Romania's infamous secret police, the Securitate.
Vladimir Mazuru (born Vladimir Mazurov; January 29, 1913 – January 1, 1986) was a Soviet officer who played a significant role in the establishment and leadership of Romania's secret police, the Securitate, during the early years of the communist regime.
In March 1950, eleven members of the Czechoslovakia national ice hockey team were arrested and incarcerated. The players, who were the reigning world champions, were preparing to defend their title at the 1950 Ice Hockey World Championships in London. However, just before their departure, eleven players were arrested by the communist regime on charges of treason and espionage, accused of planning to defect to the West.