Battle of Seven Pines
Major General Silas Casey of East Greenwich, Rhode Island led a division in the Army of the Potomac during the 1862 Peninsula Campaign that suffered heavy losses at the Battle of Seven Pines facing George Pickett's brigade. He wrote the three-volume "System of Infantry Tactics" published in August 1862, and "Infantry Tactics for Colored Troops" published in March 1863. These manuals were used by both sides during the Civil War.