The involvement of America, also Germany made a big push that gained them 40 miles, but they left their supply trains behind and so it failed. The fact that tanks and airplanes helped as well, look up battle of the Somme for more info. Hope this helped :)
They helped the Allies win the war.
I think you mean the allies.
America helped it's allies during World War 2 by shooting people and stuff. they were smart.
During World War I, the Allies finally achieved a decisive breakthrough on the Western Front in 1918. Their success on the battlefield was due mainly to two non-tactical factors: first, the demoralization of the German troops; second, the general fatigue and distress of German society behind the scenes.
The Americans helped the Allies by sending resources to them during WWI.
Winston Churchill
Allied punishments weakened the German Economy after World War 1, while Allies helped revive the German economy after World War 2.
Allied punishments weakened the German Economy after World War 1, while Allies helped revive the German economy after World War 2.
The US troops helped the Allies win the war.
The arrival of new U.S troops in Europe.
First the U.S. was neutral and delivered the weapons to the allies, and then later it helped the allies with troops and vehicles.
The US had an amazing capacity for mass production which helped the Allies win World war 2/--The Question concerns WWI It was an economic powerhouse. The war was not fought on American soil, and the US did not enter the war until its troops could tip the balance in favor of the Allies.