At the outbreak of the war, Polish army was able to put in the field almost one million soldiers, 2800 guns, 500 tanks and 400 aircraft. On the September 1st, the German forces set to war against Poland amounted to more than 1.5 million solders, 9000 guns, 2500 tanks and almost 2000 aircraft. The Red Army began the invasion sending in the first lot more than 620 000 soldiers, 4700 tanks and 3200 aircraft. Despite the overwhelming odds and the necessity of defense against the offensive in all directions, the Polish army fought for 35 days. Warsaw held until September 28th, the Polish garrison of Hel Peninsula for more than a month. The last battle against German troops took place on October 5.