What was the significance for World War I of the entry of the USA?

Question

...how did the entry of USA affected WWI?

Answer 1

It had two major effects:

1. It broke the deadlock on the Western Front, thereby giving the allies an better strategic position.

2. Because of that fact, it prompted the Germans to try and destablalize the Eastern Front by allowing Lenin safe passage through Germany back to Russia -- thus sparking the Russian Revolution.

The Germans realized that their only hope against American reinforcements on the Western Front was to pull troops from the Eastern front. That's why they brought Lenin back to Russia.

These were the two main matters of significance.

Answer 2

Basically the only significance the US played in WW1 was man power. WW1 was fought more in a line battle formation with trench warfare. The Germans had the big artillery pieces that were moved by the railway and were able to pound our allies.

With both sides wearing thin from casualties, the additional man power and supplies sent by the US tilted the favor back to the Allies. This eventually forced the Germans to surrender.

We didn't have any advanced weaponry at the time that made much of a difference.

Answer 3

I take it you mean that they were actually on the Germans side before entry. They disputed Britains blockade by naval patrol of supplies to Germany. Then, when the Germans began to use gas on the French, the US changed it's idea and began to support the Allies.
US seem to have a habit of changing ally into enemy.
Germany / Afghanistan / Iraq / look out UK

Answer 4

USA entering the war caused victory