What event in March 1917 pushed the U. S. government into declaring war on Germany?

In 1917, the U.S. joined WW1. This was triggered by Germany’s sinking of many American merchant ships near the British Isles. This is what prompted the United States to join World War 1.

“destroyers for bases agreement in the destroyers for bases agreement between the united states and the united kingdom on september 2, 1940, fifty caldwell , wickes, and clemson class us navy destroyers were transferred to the toyalbnavy from the united states navy in exchange for land rights on british possessions.” i hope this you .