How did US involvement in World War 1 directly affect the course and outcome of World War 1?

Answer 1

On April 6, 1917, two days after the U.S. Senate votes 82 to 6 to declare war against Germany, the U.S. House of Representatives endorses the decision by a vote of 373 to 50, and the United States formally enters the First World War. President Woodrow Wilson pledged neutrality for the United States, a position favored by the vast majority of Americans. Britain, however, was one of America's closest trading partners, and tension soon arose between the United States and Germany over the latter's attempted quarantine of the British Isles.
Fundamentally, as the massive Russian army left and the massive American army came in, there was not much difference or consequence, as America did not join the League of Nations,or make many post-war decisions for Europe besides Versailles

Answer 2

WW1 has a great effect on the History of the 20th century. The 'Great War' is principally a European conflict. Mainly it is a quarrel of Empires: Germany Vs France & Britain. Russia ends in abject decline & revolution in 1917. It sees the end of the Ottoman Empire in totality, Austria/Hungary ceases to exist as an entity. The Peace Treaty of Versailles can be seen in retrospect as very unfair on Germany, just as the Treaty of Brest-Litovsk was unfair on Russia. New countries are created. Poland for example becomes a new country & Africa is redistributed to the British & French from former German territories. I cannot altogether say the effects that WW1 had on what became the Great Depression of the 1930s, but this in turn generated the feelings in Germany which lead into WW2. And WW2 is the biggest of all the conflicts in History & was in large part a product of WW1. In it's own way WW1 comes from the Franco-Prussian war of 1870/71 which similarly has roots which go back to Napoleons defeat of the Prussians in 1806 at Jena/Auerstadt. (Perhaps 2nd only to Austerlitz in Napoleons great catalogue of victories. Marengo being simply a fortutious reversal of fortune) But WW1 was a huge conflict involving many, many countries and different parts of the world. It's impact cannot be understated, it was the peak of British Empire power, the USA emerged as the new kid on the block, the flower of French youth was cut down, Russia became the Soviet Union, Turkey emerged as a country rather than an Empire, the Balkan states were still in foment, Africa & the Middle East were reshaped in many ways......

Answer 3

The US in WW1 affected the war by this. The Entente and Germans were bled dry by the war and in a stalemate. But American troops were sent and the Entente had resources more than the Germans so the Allies were able to go on the offensive pushing the Germans back to Berlin.

Answer 4

In many ways, but I'll give you two: They ensured that the British were not in supreme control of operations during joint tasks between 1930-1970. This was because, as you may know, English Generals like French and Haig in WW1 used the very old-fashioned and brutal strategies of simply sending wave after wave of troops onto the enemy, to the major disapproval of USA. Thus, the significance of USA as a supreme command from that point onwards influenced the history of modern warfare hierachy (look at Iraq!) Secondly, it ensured a win for the 'allied powers' = reparations from Germany and isolation = growing fascism and nationalism= Nazi Party = WW2 !!!!!!1 Hope this helps!