The Constitution says the federal government has the power to declare war and engage in warfare. Which is a legal responsibility of the government concerning foreign war policies?

War Powers Clause. Article I, Section 8, Clause 11 of the U. S. Constitution, sometimes referred to as the War Powers Clause, vests in the Congress the power to declare war, in the following wording: ... To declare War, grant Letters of Marque and Reprisal, and make Rules concerning Captures on Land and Water ...