Declaration of War with Great Britain, 1812
On June 17, 1812, the Senate approved a resolution declaring war with Great Britain by a vote of 19-13. The House approved the measure that day, and President James Madison signed the legislation the next day, June 18, 1812, marking the first time the United States of America declared war on another nation.
Declaration of War with Mexico, 1846
On May 12, 1846, Congress approved a resolution declaring war with Mexico. The Senate approved the resolution by a vote of 40-2.
Declaration of War with Spain, 1898
On April 25, 1898, Congress approved a resolution declaring war with Spain by unanimous consent.
Declaration of War with Germany, 1917 On April 6, 1917, Congress approved a resolution declaring war with Germany. The Senate approved the resolution by a vote of 82-6 on April 4, 1917.
Declaration of War with Austria-Hungary, 1917
On December 7, 1917, Congress approved a resolution declaring war with Austria-Hungary. The Senate unanimously approved the resolution, 74-0.
Declaration of War with Japan, 1941
On December 8, 1941, Congress approved a resolution declaring war with Japan. The Senate unanimously approved the resolution, 82-0.
Declaration of War with Germany, 1941
On December 11, 1941, Congress approved a resolution declaring war with Germany. The Senate unanimously approved the resolution, 88-0.
Declaration of War with Italy, 1941
On December 11, 1941, Congress approved a resolution declaring war with Italy. The Senate unanimously approved the resolution, 90-0.
Declaration of War with Bulgaria, 1942
On June 4, 1942, Congress approved a resolution declaring war with Bulgaria. The Senate unanimously approved the resolution, 73-0.
Declaration of War with Hungary, 1942
On June 4, 1942, the Senate approved a resolution declaring war with Hungary. The Senate unanimously approved the resolution, 73-0.
Declaration of War with Rumania, 1942
On June 4, 1942, the Senate approved a resolution declaring war with Rumania. The Senate unanimously approved the resolution, 73-0.