What nation joined the Allied war effort in 1917? What nation dropped out of the war in 1918?How did these two changes affect the war?WWI

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mkoren eNotes educator| Certified Educator

There were some significant changes in the countries fighting in World War I in 1917 and in 1918. In 1917, the United States entered World War I. The United States was upset with German actions, especially with the German resumption of unrestricted submarine warfare. This action violated the American right as a neutral nation to trade with other countries during the war. The Americans were also not pleased that Germany tried to get Mexico to attack the United States, which was revealed in the Zimmermann Telegram. The entrance of the United States was a huge boost for the Allies. The Allies were struggling in their fight against the Central Powers. When the United States entered the war, it brought fresh, rested troops to help the Allies fight. The United States was also able to bring needed supplies and equipment to help the Allies in the war effort. It is fair to say that the American entrance into the war was the decisive factor in the Allied victory.

In 1918, Russia left the war. The Russian people were unhappy with the rule of Czar Nicholas II, especially with the extreme poverty many people faced. There also was discontent over the losses the Russian military experienced in the war. As a result, the Russian Revolution began leading to a new government assuming power. With the signing of the Treaty of Brest-Litovsk, the Russians stopped fighting in the war. This was a huge concern for the Allies because the Germans no longer had to fight a two-front war. Germany could move more of its troops to the western front, making it more difficult for the Allies to win the war.

brettd eNotes educator| Certified Educator

The US joined the war in 1917, which changed everything.  Massive numbers of American troops and a brand new, freshly equipped fighting force would tip the balance on the Western Front in favor of the Allies and force the Germans to eventually seek a cease fire.

At almost the same time, the Russians were forced to drop out of the war due to the Russian Revolution and their inability to fight both the German Army and the communist rebellion, or more accurately, the communists ability to fight a civil war with the Czarist nationalists.

This freed a large portion of the German Army and allowed them to focus the final offensive of the war only on the Western Front.  It very nearly gained them victory in the whole shooting match.

pohnpei397 eNotes educator| Certified Educator

The United States joined the war and Russia dropped out.  This helped swing the war to the Allies side and also made it more of an ideological war.

The entry of the US into the war helped swing things towards the Allies because it brought in huge numbers of fresh troops and all their supplies.  This broke the stalemate that had arisen.

The exit of the Russians affected the war to some degree because it made it into a war of democracies against monarchies.  This helped make the US more enthusiastic about participating in the war.