Land; Gettysburg
Water; Mobile Bay or Monitor vs Merrimack
Gettysburg
If the question is asking about the Civil War battle with the highest death toll, I believe it was the Battle of Antietam.
Gettysburg
Chancellorsville
The Battle of Mobile Bay.
From a tactical standpoint, Gettysburg is probably the best set-piece battle.
Gettysburg
Gettysburg is the greatest battle because it was the turning point in the war. Never again would the South have and strategic (big picture) victories or make an offensive move.
Gettysburg
it was at Gettysburg
Gettysburg
Gettysburg