With the thunderous crack of a cannon and the sulfurous pop of a musket, the Battle of Gettysburg was on. The Union soldiers, clad in various shades of blue, moved slowly up the hill to the tune of artillery fire drowning out a lonely trio of musicians playing the songs of war. Beneath them and occupying a small meadow, Confederate infantry men and women fired in unison to their superior’s command, each snap bringing a flurry of gun powder dancing in the air.