The monument established after the Civil War to honor fallen soldiers is the Soldiers' National Monument, located in Gettysburg, Pennsylvania. This monument commemorates the Union soldiers who fought and died in the Battle of Gettysburg, a crucial conflict during the Civil War. Unveiled in 1869, the monument features a statue of a Union soldier atop a pedestal, surrounded by various smaller sculptures representing different branches of the military. It stands as a testament to the sacrifices made by those who fought for Union causes and serves as a poignant reminder of the impact of the Civil War on American history.