Why did britain and france declare war on germany after the invasion of poland?

What is one major goal of us economic foreign policy

Which progressive reform was least related to the causes and effects of world war i? o legislation limiting the use of child labor o establishing 8-hour workdays for railroad workers o reducing tariffs on imported goods o expanding women's rights and the right to vote

African-american soldiers in world war ii sometimes felt they were fighting for two victories, one abroad and one in europe true or false