United States: Senate vote results when declaring war 1812-1942

Published by
Aaron O'Neill,
Jul 4, 2024
The U.S. Senate has formally declared war on 11 different countries, relating to five separate conflicts. The Senate's vote is the second step in this process, after a similar vote is held in the House of Representatives, and the results of these votes have generally been aligned. The last time such a vote was taken was during the Second World War, after which point the use of alternative approval methods have become more common. More information can be found here.

Results of votes to declare war in the United States Senate from 1812 to 1942

Votes in SenateForAgainst
Great Britain - Jun 17, 1812
War of 1812		 19 13
Mexico - May 12, 1846
Mexican-American War		 40 2
Spain - Apr 25, 1898
Spanish-American War*		 - -
Germany - Apr 4, 1917
First World War		 82 6
Austria-Hungary, Dec 7, 1917
First World War		 74 0
Japan - Dec 8, 1941
Second World War		 82 0
Germany - Dec 11, 1941
Second World War		 88 0
Italy - Dec 11, 1941
Second World War		 90 0
Bulgaria - Jun 4, 1942
Second World War		 73 0
Hungary - Jun 4, 1942
Second World War		 73 0
Romania - Jun 4, 1942
Second World War		 73 0
Showing entries 1 to 11 (11 entries in total)
Created with Highcharts 7.2.2Votes in Senate19194040828274748282888890907373737373731313226600000000000000ForAgainstGreat Britain - Jun 17, 1812War of 1812Mexico - May 12, 1846Mexican-American WarSpain - Apr 25, 1898Spanish-American War*Germany - Apr 4, 1917First World WarAustria-Hungary, Dec 7, 1917First World WarJapan - Dec 8, 1941Second World WarGermany - Dec 11, 1941Second World WarItaly - Dec 11, 1941Second World WarBulgaria - Jun 4, 1942Second World WarHungary - Jun 4, 1942Second World WarRomania - Jun 4, 1942Second World War
05101520253035404550556065707580859095100

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Source

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Release date

August 2022

Region

United States

Survey time period

1812 to 1942

Supplementary notes

*The source states that the vote for a Declaration of War against Spain in 1898 was done by voice. Some sources give figures of 42 for, and 35 against.

Release date is most recent date of data access,

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