In July 1863, the Battle of Gettysburg, fought over three days in and around Gettysburg, was the bloodiest and most decisive battle of the American Civil War, claiming over 50,000 Union and Confederate fatalities and repelling Robert E. Lee's invasion of the North, leading to the Union's preservation. Throughout the late 19th and 20th centuries, the state's manufacturing-based economy contributed to the development of much of the nation's early infrastructure, including key bridges, skyscrapers, and military hardware used in U.S.-led victories in World War I, World War II, and the Cold War.
in july 1863 the battle of gettysburg fought over three days in and around gettysburg was the bloodiest and most decisive battle of the american civil war claiming over 50000 union and confederate fatalities and repelling robert e lee's invasion of the north leading to the union's preservation throughout the late 19th and 20th centuries the state's manufacturing-based economy contributed to the development of much of the nation's early infrastructure including key bridges skyscrapers and military hardware used in us-led victories in world war i world war ii and the cold war