Two
German Panzer IVs moving towards the German-Soviet demarcation line on
21 June 1941, less than 24 hours away before the start of Unternehmen
Barbarossa, German invasion of Russia. In the foreground road sign
"Grenze 1 km". For the campaign against the Soviet Union, the Germans
allotted almost 150 divisions containing a total of about three million
men. Among those units were 19 panzer divisions, and in total the
Barbarossa force had about 3,000 tanks, 7,000 artillery pieces, and
2,500 aircraft.
Source :
https://9gag.com/gag/ajgVB0Q
https://en.topwar.ru/188854-21-ijunja-stalin-dilemma-prinjatija-reshenija.html
https://en.wikipedia.org/wiki/Operation_Barbarossa