Why did the Allies land at Normandy, instead of attacking the Nazis from Italy, where they already had a foothold?

by WORTWORTWillis

What was the rationale for risking a costly and dangerous amphibious landing at Normandy, rather than sweeping into France and Germany from the south, through Italy?

corruptrevolutionary

The same question was asked last week and answered by u/AlistairStarbucks. the simple answer is the big-ass mountain chain that separates Italy and France and Germany