Answer:
American leaders explained their decision to enter World War I by saying they wanted to make the world safe for democracy.
Step-by-step explanation:
On April 2, 1917, US President Woodrow Wilson asked Congress to declare war on Germany in order to make the world safe for democracy in what became known as his War Message. For Wilson, as well as for many American leaders, Germany's militarism was a threat democracy to all nations because its government was violent to both their own domestic constituents and to other democratic nations, and, as declared by Wilson: “No autocratic government could be trusted to keep faith within it or observe its covenants.”