Answer:
The United States declared war as a result of Germany's invasion of Poland.
Step-by-step explanation:
Image result for did The United States declared war as a result of Germany's invasion of Poland.
France and Britain did declare war on Germany two days after the invasion of Poland, but it would take them another eight months before they engaged in full-scale war with the Nazis. The United States wouldn't join the war against Hitler until December 1941, a full two years after the war began