PoliticalGraveyard.com
The Political Graveyard: A Database of American History
Politicians Killed in the Mexican War
(1846-1847)

Very incomplete list!

in chronological order

Thomas L. Hamer Thomas Lyon Hamer (1800-1846) — also known as Thomas L. Hamer — of Georgetown, Brown County, Ohio. Born in Northumberland County, Pa., July, 1800. Democrat. School teacher; lawyer; member of Ohio state house of representatives, 1825, 1828-29; Speaker of the Ohio State House of Representatives, 1829; Presidential Elector for Ohio, 1828; U.S. Representative from Ohio 5th District, 1833-39; general in the U.S. Army during the Mexican War. Nominated Ulysses S. Grant to be a cadet at the U.S. Military Academy at West Point. Died in the military service, probably from dysentery, at Monterrey, Nuevo León, December 2, 1846 (age 46 years, 0 days). Original interment somewhere in near Monterrey, Nuevo León; reinterment at Old Georgetown Cemetery, Georgetown, Ohio; cenotaph at Congressional Cemetery, Washington, D.C.
  Relatives: Uncle of Thomas Ray Hamer (1864-1950).
  The village of Hamersville, Ohio, is named for him.
  See also congressional biography — Govtrack.us page — Wikipedia article — Find-A-Grave memorial — OurCampaigns candidate detail
  Image source: Unknown
  Archibald Yell (1797-1847) — of Fayetteville, Washington County, Ark. Born in North Carolina, August 9, 1797. Democrat. Served in the U.S. Army during the War of 1812; federal judge, 1832-35; U.S. Representative from Arkansas at-large, 1836-39, 1845-46; resigned 1846; Governor of Arkansas, 1840-44; colonel in the U.S. Army during the Mexican War. Killed in the Mexican War Battle of Buena Vista, Coahuila, February 22, 1847 (age 49 years, 197 days). Interment at Evergreen Cemetery, Fayetteville, Ark.
  Yell County, Ark. is named for him.
  See also congressional biography — Govtrack.us page
  John J. Hardin (1810-1847) — of Illinois. Born in Frankfort, Franklin County, Ky., January 6, 1810. Member of Illinois state house of representatives, 1836; U.S. Representative from Illinois 7th District, 1843-45; served in the U.S. Army during the Mexican War. Killed at the Battle of Buena Vista, Mexico, February 23, 1847 (age 37 years, 48 days). Interment at City Cemetery, Jacksonville, Ill.
  Relatives: Son of Martin Davis Hardin (1780-1823).
  Political family: Hardin family of Frankfort, Kentucky.
  See also congressional biography — Govtrack.us page
  Henry Clay, Jr. (1811-1847) — of Kentucky. Born in Lexington, Fayette County, Ky., April 10, 1811. Lawyer; member of Kentucky state house of representatives, 1835-37; colonel in the U.S. Army during the Mexican War. Episcopalian. Killed in action at the Battle of Buena Vista, Buena Vista, Coahuila, February 23, 1847 (age 35 years, 319 days). Interment at Frankfort Cemetery, Frankfort, Ky.
  Relatives: Son of Henry Clay (1777-1852) and Lucretia (Hart) Clay (1781-1864); brother of Thomas Hart Clay and James Brown Clay; married 1832 to Julia Prather (1814-1840); nephew of Porter Clay; uncle of Henry Clay (1849-1884); first cousin twice removed of Matthew Clay and Green Clay; second cousin once removed of Cassius Marcellus Clay; third cousin twice removed of Oliver Carroll Clay; third cousin thrice removed of Archer Woodford (1899-1955).
  Political families: Clay family of Kentucky; Washington family; Meriwether-Kellogg-Tyler family of Virginia and Connecticut (subsets of the Three Thousand Related Politicians).
  Clay County, Iowa is named for him.
  See also Wikipedia article — Find-A-Grave memorial
  Robert Hanna Hammond (1791-1847) — also known as Robert H. Hammond — of Milton, Northumberland County, Pa. Born in Milton, Northumberland County, Pa., April 28, 1791. Northumberland County Register and Recorder; postmaster; U.S. Representative from Pennsylvania 16th District, 1837-41; served in the U.S. Army during the Mexican War. Wounded during the Mexican War; ordered home on sick leave, but died of his wounds en route, aboard the steamship Orleans, in the North Atlantic Ocean, June 2, 1847 (age 56 years, 35 days). Interment at Milton Cemetery, Milton, Pa.
  See also congressional biography — Govtrack.us page — Wikipedia article — Find-A-Grave memorial
  Pierce Mason Butler (1798-1847) — also known as Pierce M. Butler — of South Carolina. Born April 11, 1798. Governor of South Carolina, 1836-38; colonel in the U.S. Army during the Mexican War. Killed in action at Battle of Churubusco, Distrito Federal, August 20, 1847 (age 49 years, 131 days). Interment somewhere in Edgefield, S.C.
  Relatives: Son of William Butler (1759-1821) and Behethland (Moore) Butler; brother of William Butler (1790-1850) and Andrew Pickens Butler; married to Miranda Duval; uncle of Matthew Calbraith Butler.
  Political family: Butler family of Edgefield, South Carolina (subset of the Three Thousand Related Politicians).
  Robert Milner Echols (1798-1847) — also known as Robert M. Echols — of Walton County, Ga. Born near Washington, Wilkes County, Ga., 1798. Member of Georgia state house of representatives, 1824-29; member of Georgia state senate, 1830-44; general in the U.S. Army during the Mexican War. Killed in action when he fell from his horse during battle, at National Bridge (Puente Nacional), near Veracruz, Veracruz, December 3, 1847 (age about 49 years). Original interment somewhere in Mexico; reinterment at a private or family graveyard, Walton County, Ga.
  Echols County, Ga. is named for him.
"Enjoy the hospitable entertainment of a political graveyard."
Henry L. Clinton, Apollo Hall, New York City, February 3, 1872
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