Battle of Stalingrad strategic petroleum resources for Germany. The expansion of objectives was a significant factor in Germany's failure at Stalingrad, caused by German overconfidence and an underestimation of Soviet reserves. The Soviets realized that they were under tremendous constraints of time and resources and ordered that anyone strong enough to hold a rifle be sent to fight. Army Group South was selected for a sprint forward through the southern Russian steppes into the Caucasus to capture the vital Soviet oil fields there. The planned summer offensive, code-named "Fall Blau" (Case Blue), was to include the German 6th, 17th, 4th Panzer and 1st
History of the Russian language in Ukraine settlers onto what became Ukrainian territory came in the late 16th century to the area known as Slobozhanschyna or Sloboda Ukraina, in what is now northeastern Ukraine. This territory was settled after being abandoned by the Tatars. Russian settlers however were outnumbered by Ukrainian settlers who were escaping harsh exploitative conditions in the west. More Russian speakers appeared in the northern, central and eastern territories that are now Ukraine during the late 17th century, following the Cossack Rebellion (1648–1657) which Bohdan Khmelnytsky led against Poland. The Khmelnytsky Uprising led to a massive movement of Ukrainian settlers to the Slobozhanschyna region,