What happen in war world 1 and war world 2?

Answer 1

This is a ridiculously broad question. So I'll be brief.

World War One was primarily a war of attrition, Germany's initial plan was to quickly attack France and take Paris when this failed the 'Race to the Sea' happened where a series of outflanking battles were fought trying to get to the key sea ports. During this, trenches grew up from the alps to the sea cutting French and Belgium almost in half. Russia was also invaded. Small battles continued almost continuously until 1917 where millions of lives were lost. Then the Germans launched their 'Spring Offensive' it was worryingly successful until the German army came within 40 miles of Paris and ran out of steam. The allies responded quickly and efficiently and began the 'Hundred Days' until Germany was knocked back almost out of France before Germany agreed to sign an armistice.

World War Two was less so. Hitler used a strategic tactic 'Blitzkrieg' which used stunning force and speed to quickly conquer France. Unlike in World War One Germany conquered France very quickly and stopped Britain from entering the war in Europe. Shortly after Germany (stupidly) invaded Russia. They were making good progress until they hit Stalingrad a bitter battle was fought over it where the Russians very effectively destroyed the German elite army. Germany had lost the war in Russia. At the same time Germany was planning on invading Britain however the RAF was too strong. The Luftwaffe launched an assault on Britain, but with the aid of radar the RAF successfully beat them off sustaining heavy losses. This meant Germany couldn't invade Britain. When America entered the war D-day began to be planned. Germany was slowly losing and an amphibious assault was launched (D-day) heavy losses were sustained on both sides and Russia was also pushing West. Germany however did not surrender and when the allies reached Berlin they devastated it.

This is a scandalously simplified account which misses out all the politics not to mention the Holocaust.