Hitler World War 1

                                       
At the outbreak of World War I, Hitler was a resident of Munich and volunteered to serve in the Bavarian Army as an Austrian citizen.^[53] Posted to the Bavarian Reserve Infantry Regiment 16 (1st Company of the List Regiment),^[54][53] he served as a dispatch runner on the Western Front in France and Belgium,^[55] spending nearly half his time well behind the front lines.^[56][57] He was present at the First Battle of Ypres, the Battle of the Somme, the Battle of Arras, and the Battle of Passchendaele, and was wounded at the Somme.^[58]

Hitler (far right, seated) with his army comrades of the Bavarian Reserve Infantry Regiment 16 (c. 1914–1918)

He was decorated for bravery, receiving the Iron Cross, Second Class, in 1914.^[58] Recommended by Hugo Gutmann, he received the Iron Cross, First Class, on 4 August 1918,^[59] a decoration rarely awarded to one of Hitler's rank (Gefreiter). Hitler's post at regimental headquarters, providing frequent interactions with senior officers, may have helped him receive this decoration.^[60] Though his rewarded actions may have been courageous, they were probably not highly exceptional.^[61] He received the Black Wound Badge on 18 May 1918.^[62]
During his service at the headquarters, Hitler pursued his artwork, drawing cartoons and instructions for an army newspaper. During the Battle of the Somme in October 1916, he was wounded either in the groin area^[63] or the left thigh when a shell exploded in the dispatch runners' dugout.^[64] Hitler spent almost two months in hospital at Beelitz, returning to his regiment on 5 March 1917.^[65] On 15 October 1918, he was temporarily blinded by a mustard gas attack and was hospitalised in Pasewalk.^[66] While there, Hitler learnt of Germany's defeat,^[67] and—by his own account—on receiving this news, he suffered a second bout of blindness.^[68]

Adolf Hitler as a soldier during the First World War (1914–1918)

Hitler described the war as "the greatest of all experiences", and was praised by his commanding officers for his bravery.^[69] His wartime experience reinforced his German patriotism and he was shocked by Germany's capitulation in November 1918.^]He was embittered over the collapse of the war effort, and his ideology began to take shape. Like other German nationalists, he believed in the  stab-in-the-back myth(Dolchstoßlegende), which claimed that the German army, "undefeated in the field", had been "stabbed in the back" on the home front by civilian leaders and Marxists, later dubbed the "November criminals".
The Treaty of Versailles stipulated that Germany must relinquish several of its territories and  the demilitarise Rhineland . The treaty imposed economic sanctions and levied heavy reparations on the country. Many Germans perceived the treaty—especially Article 231, which declared Germany responsible for the war—as a humiliation. The Versailles Treaty and the economic, social, and political conditions in Germany after the war were later exploited by Hitler for political gains.