John Lawrence Grattan
John Lawrence Grattan | |
|---|---|
| Born | June 1, 1830 |
| Died | August 19, 1854 (aged 24) Near Fort Laramie, Wyoming |
| Buried | Fort Leavenworth, Kansas |
| Allegiance | United States of America |
| Branch | United States Army |
| Service years | 1853–1854 |
| Rank | Second Lieutenant |
| Unit | 6th Infantry Regiment |
| Conflicts | 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.