President wilson took the usa into the first word war in 1917. Usa had deliberatly isolated itself from the squabbles of Europe. It was the German sumbarine that brought the U.S into war.
Wilson presented the war to the American people as a struggle to preserve freedom and democracy.Wilson got hopelessly bogged down in the squabbles of the European states after the war.
Thousands of American soldiers had been killed or wounded, us troops were now even involved in a civil war in Russia.
President Wilson travveled the country in 1919 to get the American problem and congress to accept the treaty of versaille and the league of nations.The president needed support of congress.Wilson had many political enemies and eventualy they bought him down. In,the end the Isolationists won the debate.