What are four reasons the U. S. formally entered World War 1?

The sinking of the Lusitania, Germany's unrestricted submarine warfare, the breaking of the Sussex pledge, and as well as the Zimmermann Note.

Explanation:

they wanted equal rights hawaii’s monarchy was overthrown when a group of businessmen and sugar planters forced queen liliuokalani to abdicate. the coup led to the dissolving of the kingdom of hawaii two years later, its annexation as a u.s. territory and eventual admission as the 50th state in the union.

d) resisting gorbachev’s reforms