
A deep dive into key battles that left an indelible mark on America.

Two years into the Civil War, the Union is losing the fight and desperately needs a victory to stop Robert E. Lee's push north; near Sharpsburg, Md., Union troops take a stand in a battle that could save America or end it for good.

In the spring of 1863, the Civil War enters its third bloody year; for the North, the clearest path to victory runs through the last Confederate holdout, Vicksburg, but taking the fortified city amid unforgiving terrain may require a miracle.

America's push west forces conflicts with Native tribes; driven by ego, George Custer launches a doomed assault against a large band of Indigenous warriors, now enshrined as "Custer's Last Stand."

Over a year before the Declaration of Independence, America is born at Bunker Hill; the first major battle of the revolution is also its bloodiest.