Why did the US join World War 1 in 1917?

What is the political difference between patriots and loyalists? Who are the Snohomish tribe? What did Joseph glidden invent? What was Cuba's primary export to the US during the early 1900s? How much is a 1913 lady liberty V coin marked copy worth? What allowed settlers to get free western land? What tribe killed the most White Settlers? Did a Ukrainian immigrant name John Slemko arrive in Canada in the 1920's? Examples of transportation revolution? When did Andrew jacksons army defeat the british at new Orleans? How many slave owners were there in 1860? Are there any 1949 silver dollars? Who was a sailor and later a union naval caption and was highly honored for his feats of bravery and heroism and became a congressman after the civil war? How did the onondaga wear their feathers? How can you find out if 1818 coins are original? Who said i desire you would remember the ladies? What is the timeline of haiti from 1800 to now? To start a settlement in a new land? What is the value of circulated Lincoln pennies? When According to the readings which group opposed the women's suffrage movement the most?