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 [decorative delimiter] Class of 1836

Vol. I
p641
857

(Born Pa.)

John P. J. O'Brien

(Ap'd Pa.)

16

Born Mar. 17, 1814, Baltimore, MD.

Military History. — Cadet at the Military Academy, July 1, 1832, to July 1, 1836, when he was graduated and promoted in the Army to

Second Lieut., 4th Artillery, July 1, 1836.

Served: in Operations in Creek Nation, 1836; in the Florida War, 1836‑38, being engaged against the Seminole Indians in the Combat of Locha-Hatchee, Jan. 24, 1838; in the Cherokee Nation, 1838, while

(First Lieut., 4th Artillery, July 7, 1838)

transferring the Indians to the West; in garrison at Ft. Columbus, N. Y., 1838; in the Florida War, 1838‑39; in garrison at Ft. Columbus, N. Y., 1839; at the Camp of Instruction near Trenton, N. J., 1839; on the Northern Frontier during Canada Border Disturbances, at Detroit, Mich., 1839‑41, — and Buffalo, N. Y., 1841‑42; in garrison at Ft. Monroe, Va., 1842‑43, — and Carlisle Barracks, Pa., 1844‑46; in Military Occupation of Texas, 1846; in the War with Mexico, 1846‑48, being engaged in the

(Capt., Staff — Asst. Quartermaster, Jan. 18, 1847, to May 16, 1849)

march through Chihuahua, 1846‑47, — Battle of Buena Vista, Feb. 22‑23,

(Bvt. Major, Feb. 23, 1847,
for Gallant and Meritorious Conduct in the Battle of Buena Vista, Mex.)

where he was wounded, — and as Quartermaster at Camargo, Mex.,

(Captain, 4th Artillery, May 16, 1849)

p642 1847‑48; and on Quartermaster duty at St. Augustine, Fla., 1848, — East Pascagoula, Mis., 1848, — and La Vaca, Tex., 1848‑49.

Civil History. — Author of "A Treatise on American Military Laws, and the Practice of Courts Martial, with Suggestions for their Improvement," 1846.

Died, Mar. 31, 1850, at Indianola, Tex.: Aged 32.


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