How did the arrival of union reinforcements affect the outcome of the battle of gettysburg? the union was able to avoid more casualties. the union was able to hold the line and eventually win. the confederacy surrendered immediately. the confederacy had to take a defensive position.

because of its location and commercial importance, atlanta was used as a center for military operations and as a supply route by the confederate army during the civil war. therefore, it also became a target for the union army. general william tecumseh sherman and his troops captured the city in 1864.