Second reasons were German’s poor logistics and planning strategy. One of the reasons is because Germany was way too confidents, they’ve over underestimated Soviet Union. That leads to unrealistic, poor strategy and logistics. “The invasion had three main objectives. Army Group Center, consisting of 1.3 million troops, 2,600 tanks and 7,800 artillery pieces, mounted a massive drive on Moscow. Meanwhile, Army Group North, consisting of 700,000 troops, 770 tanks and 4,000 artillery pieces.” (Erik Sass, Operation Barbarossa: The Biggest Military Adventure in History) Hitler uses the strategy called “blitzkrieg”, or “lightning war”. This is the same strategy Hitler use to defeat France and Poland, but this doesn’t work on Soviet Union. Soviet Union was also surprised by this invasion, due to Stalin’s belief Germany won’t attack it’s own allied, especially after signing the Molotov-Ribbentrop Pact. Due to the difficulty of getting fuel for supplies, Germany sometimes has not enough fuel to reach to the destination. Their army doesn’t have enough ammunition and other supplies as well. Food was never important to Hitler. Because it is hard to get supplies while in the frontline of battlefield or marching toward the heartland of Russia, Hitler has to choose between food, ammunition, and warm clothes, Hitler mostly choose ammunition instead of others. “Commanders in the field relied on foraging local livestock to feed the soldiers and this continued until such time when shortages resulted in troops eating their units' horses.” (MAJ Loganathan, Failure Of Logistics In “Operation Barbarossa” And Its Relevance Today) By September 1941, Germany was winning and the invasion was successful so far. They have already conquered Kiev and Odessa, and pushing forward to Leningrad and Moscow. “By December 1941, the combined German armies had killed 360,000 Soviet soldiers, wounded one million, and captured two million more, for total Red Army losses of around 3.4 million by the end of the year. In six months, German troops and their allies advanced up to 600 miles and occupied over 500,000 square miles of Soviet territory, home to 75 million people.