Final answer:
George Gordon Meade was a Union commander during the Civil War who played a crucial role in the Union victory at the Battle of Gettysburg by preventing Confederate forces from advancing into northern states.
Step-by-step explanation:
Major General George Gordon Meade is a significant figure in American history due to his role as the Union commander during the Battle of Gettysburg. This pivotal battle, which took place during the American Civil War, was a major turning point as Meade's leadership helped to prevent Confederate forces from moving the battleground into northern states.
His successful command at Gettysburg was crucial in keeping his army between the Confederates and the Capitol, thereby protecting Washington. Although not as widely recognized as some of his contemporaries, Meade's contributions to the Union victory and his defense to maintain the Union are noteworthy historical points.