After the occupation of Latvia by the USSR in June 1940, much of the previous Latvian army was disbanded and many of its soldiers and officers were arrested and imprisoned or executed. The following year Nazi Germany occupied Latvia during the offensive of Army Group North. The German Einsatzgruppen were aided by a group known as Arajs Kommando in the killing of Latvian Jews as part of the Holocaust. Latvian soldiers fought on both sides of the conflict against their will, and in 1943 180,000 Latvian men were drafted into the Latvian Legion of the Waffen-SS and other German auxiliary forces.