“7,000 casualties in twenty minutes at Cold Harbor”
That was out of an assault mounted by three corps (about 36-40,000 men.) Lee lost 7,000 casualties assaulting Cemetery Ridge at Gettysburg out of an attack force of 1 division and two additional brigades (about 12-13000 men). Grant is called a butcher for the assault at Cold Harbor. What does that make Lee.
My family lost a leg and a son at Cold Harbor. What a mess.
Being forced to die in a desperate effort to save your own land makes of you a hero.
Butchery.
Concerning the strategic blunder by Lee at Gettysburg, we see his men pressing the attack to the high water mark... almost breaking the Union line... (again, a singular effort to end the war). In Cold Harbor, we see men driven forth... losing 7000 in twenty minutes... then digging in and having other units push in behind... then they too tried to dig into the open field.
Grant left the engagement lag from 4AM until later that noon. Then, as aforementioned, he left the men in the field to die. Total Union casualties at Cold Harbor almost 13 thousand while the South suffered 5200 (with only 1500 on June 3rd).