John Lawrence Grattan

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John Lawrence Grattan
Born	(1830-06-01)June 1, 1830 Corinth, Vermont
Died	August 19, 1854(1854-08-19) (aged 24) Near Fort Laramie, Wyoming
Buried	Fort Leavenworth, Kansas
Allegiance	United States of America
Service / branch	United States Army
Years of service	1853–1854
Rank	Second Lieutenant
Unit	6th Infantry Regiment
Battles / wars	American Indian Wars

John Lawrence Grattan (June 1, 1830 – August 19, 1854) was a mid-19th-century U.S. Army officer, whose poor judgement and inexperience led to the Grattan massacre, which was a major instigator for the First Sioux War.