Answer:
<h2>11 Times</h2>
Explanation:
The congress has formally declared war 11 times. It first declare war against Great Britain in 1812. The last formal declaration of war was during the second world war. The war powers clause ( Article 1, Section 8, clause 11) of the US constitution grants Congress the power to declare war.
Congress is made up of Senate and House of representatives, it can declare war, makes laws, controls taxing, spending policies and interstate, foreign commerce. It can allow the citizens to capture enemy vessels, it can raise army and maintain a Navy.
