What was an effect of the United States entry into World War I? Britain shifted most of its troops to the eastern front because they were no longer needed in France.
The Ottoman Empire immediately surrendered to the Allied powers, realizing that its fight was futile.
Tensions developed between American and French troops over who would occupy the best trenches.
The arrival of fresh troops to the Allied side forced Germany to agree to a cease-fire within a year.

The entry of the United States was the turning point of the war, because it made the eventual defeat of Germany possible. It had been foreseen in 1916 that if the United States went to war, the Allies' military effort against Germany would be upheld by U.S. supplies and by enormous extensions of credit.

The advent of the United States into the war was a watershed moment in the conflict because it paved the way for Germany's eventual defeat. In 1916, it was predicted that if the US entered to war, the Allies' military campaign against Germany would be bolstered by US supplies and massive credit lines.

Explanation:

for starters, there is the structural trend of rising primary government expenditure as a share of gdp, which reached 36% in 2014, up from 22% in 1991. this increase reflected a political desire to address the poverty and inequality that had gone unaddressed during previous decades. to support the increase, brazil’s government increased taxes on consumption and promoted progress toward labor-market formalization. nonetheless, public investment, particularly in infrastructure, took a hit. in fact, with the exception of the 2005-2008 period, total investment as a share of gdp has remained below 20% since 1991.

declare war, appoint military officers, sign treaties, make alliances