After the German invasion of Poland that marked the start of World War II in Europe, the Soviet Union invaded and annexed eastern parts of the Second Polish Republic. In 1940 the Soviet Union occupied Estonia, Latvia, Lithuania, Bessarabia (now the Republic of Moldova) and Bukovina. According to some estimates, hundreds of thousands of Polish citizens and inhabitants of the other annexed lands, regardless of their ethnic origin, were arrested and sent to the Gulag camps. However, according to the official data, the total number of sentences for political and anti-state (espionage, terrorism) crimes in the USSR in 1939–41 was 211,106.