Civil War event by Isa

Description of Battle of Gettysburg: The Battle of Gettysburg, fought from July 1 to July 3, 1863, is considered the most important engagement of the American Civil War. After a great victory over Union forces at Chancellorsville, General Robert E. Lee marched his Army of Northern Virginia into Pennsylvania in late June 1863. On July 1, the advancing Confederates clashed with the Union’s Army of the Potomac, commanded by General George G. Meade, at the crossroads town of Gettysburg. The next day saw even heavier fighting, as the Confederates attacked the Federals on both left and right.

Explanation:

the exclusive possession or control of the supply or trade in a commodity or service.