The U.S.-Mexican War
U.S. Military Organizations
REGULARS (Old Establishment)
1st Regiment of Dragoons 1st Regiment of Infantry 1st Regiment of Artillery
2nd Regiment of Dragoons 2nd Regiment of Infantry 2nd Regiment of Artillery
Mounted Riflemen 3rd Regiment of Infantry 3rd Regiment of Artillery
4th Regiment of Infantry 4th Regiment of Artillery
5th Regiment of Infantry
6th Regiment of Infantry
7th Regiment of Infantry
8th Regiment of Infantry

REGULARS (10 New Regiments)
The following were "new" one-year regiments authorized by Congress on February 11, 1847.

VOLUNTEER ORGANIZATIONS

Click on the state name to go directly to a list of organizations that served from that state.
ALABAMA
Battalion of Alabama Volunteers for 3 months (4 companies)
May to August 1846

1st Regiment of Alabama Volunteers for 12 months
June 1846 to May 1847

Battalion of Alabama Volunteers for the war (5 companies)
November and December 1847 to July 1848

3 Independent Companies of Alabama Volunteers for 6 months
May to August 1846

Independent Company of Alabama Mounted Volunteers for the war
June 1847 to July 1848

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ARKANSAS
1st Regiment of Arkansas Mounted Volunteers for 12 months
June and July 1846 to June 1847

2 Independent Companies of Arkansas Mounted Volunteers
May 1847 to June 1848 and June 1847 to June 1848

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CALIFORNIA
Battalions of California Volunteers for 3 and 6 months
July and October 1846 to April 1847

Battalion of Sailors, from the fleet on the Pacific coast, organized by Commodore Stockton for the recapture of Los Angeles, California, January 1847.

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FLORIDA
2 Independent Companies of Florida Volunteers
February 1847 to March 1848 and August 1847 to July 1848

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GEORGIA
1st Regiment of Georgia Volunteers for 12 months
June 1846 to May 1847

Battalion of Georgia Volunteers for the war (5 companies)
July 1847 to July 1848

Battalion of Georgia Mounted Volunteers for the war (6 companies)
September 1847 to July 1848

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ILLINOIS
1st Regiment of Illinois Volunteers for 12 months
June 1846 to June 1847

2nd Regiment of Illinois Volunteers for 12 months
June 1846 to June 1847

3rd Regiment of Illinois Volunteers for 12 months
July 1846 to May 1847

4th Regiment of Illinois Volunteers for 12 months
July 1846 to May 1847

1st Regiment of Illinois Volunteers for the war
June 1847 to October 1848

2nd Regiment of Illinois Volunteers for the war
August 1847 to July 1848

4 Independent Companies of Illinois Volunteers for the war
1st: May 1847 to November 1848;
2nd: August 1847 to July 1848;
3rd: August 1847 to October 1848;
4th: September 1847 to July 1848.

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INDIANA
1st Regiment of Indiana Volunteers for 12 months
June 1846 to June 1847 2nd Regiment of Indiana Volunteers for 12 months
June 1846 to June 1847

3rd Regiment of Indiana Volunteers for 12 months
June 1846 to June 1847

4th Regiment of Indiana Volunteers for the war
June 1847 to July 1848

5th Regiment of Indiana Volunteers for the war
October 1847 to July 1848

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IOWA
Battalion of Iowa "Mormon" Volunteers for 12 months (5 companies)
July 1846 to July 1847

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KENTUCKY
Regiment of Kentucky Cavalry Volunteers for 12 months
June 1846 to July 1848

1st Regiment of Kentucky Volunteers for 12 months
May 1846 to May 1847

2nd Regiment of Kentucky Volunteers for 12 months
June 1846 to June 1847

3rd Regiment of Kentucky Volunteers for the war
October 1847 to July 1848

4th Regiment of Kentucky Volunteers for the war
October 1847 to July 1848

Independent Company of Kentucky Volunteers
May 1846 to May 1847

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LOUISIANA
1st Battalion of Louisiana Volunteer Artillery for 3 months (2 companies)
August 1845 to November 1845

2nd Battalion of Louisiana Volunteer Artillery for 6 months (3 companies)
May 1846 to July 1846

P. F. Smith's Brigade of Louisiana Volunteers for 6 months (6 regiments)
May and June 1846 to August 1846

Independent Company of Louisiana Volunteers for 12 months
July 1846 to May 1847

1st Regiment of Louisiana Volunteers for the war
December 1846 to July 1848

Battalion of Louisiana Volunteers for the war (5 companies)
May 1847 to July 1848

Battalion of Louisiana Mounted Volunteers for 12 months (5 companies)
July and August 1847 to July 1848

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MARYLAND AND D.C.
Battalion of Maryland and District of Columbia Volunteers for 12 months (6 companies)
May 1846 to May 1847

1st Regiment of Maryland & District of Columbia Volunteers for the war
May and June 1847 to July 1848

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MASSACHUSETTS
1st Regiment of Massachusetts Volunteers for the war
January and February 1847 to July 1848

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MICHIGAN
1st Regiment of Michigan Volunteers for the war
June 1847 to June 1848

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MISSISSIPPI
1st Regiment of Mississippi Rifles Volunteers for 12 months
June 1846 to June 1847

2nd Regiment of Mississippi Volunteers for the war.
January 1847 to July 1848.

1st Battalion of Mississippi Rifle Volunteers for the war.
(5 companies) Oct. and Nov. 1847 to June 1848.

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MISSOURI
1st Regiment of Missouri Mounted Volunteers for 12 months.(8 companies)
June 1846 to June 1847.

2nd Regiment of Missouri Mounted Volunteers of 12 months.
July 1846 to September 1847.

Battalion of Missouri Volunteers for 12 months.
(3 companies Light Artillery; 2 Companies Infantry)
June and July 1846 to June and July 1847.

Battalion of Missouri Mounted Volunteers for 12 months. (4 companies)
August 1846 to August 1847.

Battalion of Missouri Volunteers for the war. (5 companies)
May 1847 to October 1848.

3rd Regiment of Missouri Mounted Volunteers for the war.
July 1847 to October 1848.

Battalion of Missouri Mounted Volunteers for the war. (5 companies)
August 1847 to November 1848.

Battalion of Missouri Mounted Volunteers for the war. (5 companies)
September 1847 to October 1848.

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NEW JERSEY
Battalion of New Jersey Volunteers for the war. (4 companies)
September 1847 to July 1848.

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NEW YORK
1st Regiment of New York Volunteers for service in California and for during the war.
August 1, 1846 to August, September and October 1847.

2nd Regiment of New York Volunteers for the war.
November and December 1846 to August 1848.

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NORTH CAROLINA
Regiment of North Carolina Volunteers for the war.
January and February 1847 to August 1848.

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OHIO
1st Regiment of Ohio Volunteers for 12 months.
June 1846 to June 1847.

2nd Regiment of Ohio Volunteers for 12 months.
June and July 1846 to June 1847.

3rd Regiment of Ohio Volunteers for 12 months.
June 1846 to June 1847.

4th Regiment of Ohio Volunteers, 1st for the war.
May and June 1847 to July 1848.

Regiment of Ohio Volunteers, 2nd for the war.
September 1, 1847 to July 1848.

Independent Companies of Ohio Volunteers for the war.
1st(Company of Mounted Men): June 1, 1847 to August 2, 1848.
2nd(Company of Foot): October 5, 1847 to July 25, 1848.
3rd(Company of Foot): October 26, 1847 to July 17, 1848.

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PENNSYLVANIA
1st Regiment of Pennsylvania Volunteers for the war.
December 1846 to July and August 1848.

2nd Regiment of Pennsylvania Volunteers for the war. (12 companies)
January 1847 to July 1848.

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SOUTH CAROLINA
Regiment of South Carolina Vols. "Palmetto Regiment" for the war.
December 1846 to June and July 1848.

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TENNESSEE
Regiment of Tennessee Mounted Volunteers for 12 months.
June 1846 to May 1847.

1st Regiment of Tennessee Volunteers for 12 months. (12 companies)
May and June 1846 to May 1847.

2nd Regiment of Tennessee Volunteers for 12 months. (8 companies)
June 1846 to May 1847.

3rd Regiment of Tennessee Volunteers for the war.
October 1847 to July 1848.

4th Regiment of Tennessee Volunteers for the war. (9 companies)
November 1847 to August 1848.

5th Regiment of Tennessee Volunteers for the war. (11 companies) December 1847 to July 1848.

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TEXAS
General Staff of Texas Volunteers
July 1846 to October 1846.

1st Regiment of Texas Mounted Rifle Volunteers.
June and July 1846 to Sept. and Oct. 1847.

2nd Regiment of Texas Mounted Volunteers.
June and July 1846 to October 1846.

Regiment of Texas Rifle Volunteers.
May, June and July 1846 to August 1846.

Regiment of Texas Mounted Volunteers for 6 months.
(7 companies for frontier defense)
July 1846 to September 1846.

Battalion of Texas Mounted Volunteers. (4 companies)
March 1847 to June 1848.

Regiment of Texas Mounted Volunteers for 12 months and during the war.
April and May 1847 to April and May 1848.

Regiment of Texas Mounted Volunteers for 6 months.
(for frontier defense)
May 11, 1847 to June 5, 1847.

Battalion of the same, of 5 companies for local defense.
April 1847 to June 5, 1847.

Regiment of Texas Mounted Volunteers for frontier defense.
Sept. and October 1847 to September 1848.

Independent Companies of Texas Volunteers.
1st (Mounted Company): Sept. 25, 1845 to June 25, 1846.
2nd (Company of Rangers): Sept. and Dec. 10, 1845 and March 1846 for two periods of 3 mos. each; discharged July 1846.
3rd (Mounted Company): Oct. 1, 1845 and January 1846 to September 1846.
4th (Mounted Company): May and August 1846 to Sept. 18, 1846.
5th (Mounted Company): July 1846 to October 1846.
6th (Mounted Company): July 1846 to July 1847
. 7th (Company of Foot Volunteers - first enrolled in Mississippi): August 1846 to January 7, 1847.
8th (Rifle Company): Sept. 1, 1846 to July 1, 1847.
9th (Company Volunteers at Monterey): Oct. 8, 1846 to Oct. 1847.
10th (Company Volunteers): October 1846 to October 1847.
11th (Mounted Company of Spies): Jan. 31, 1847 to July 31, 1847.

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VIRGINIA
Regiment of Virginia Volunteers for the war. (14 companies)
December 1846 and January 1847 to August 1848.

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This information on this page has been taken from the DMWV publication U.S. Veterans of the War with Mexico: A Guide to Genealogical Research.

Permission is granted to reproduce this page for non-profit educational purposes only.

This page last updated January 29, 1999.

Copyright © 1998-1999 by the Descendants of Mexican War Veterans. All rights reserved.