Because they were landing at night in unexplored enemy held territory.
They were being dropped behind enemy lines, in sticks which ended up scattering all over the place, and, if the beach landings failed, they'd have no chance of reinforcement.
There were essentially 8 invasion points, the 5 beaches, and 3 areas inland where paratroopers and glider troops landed.
The Invasion of Normandy, also known as Normandy Landings (D-day), commenced on a Tuesday, June 6, 1944. There were 24,500 US paratroopers that landed at the battle scene of Normandy (500 of them being highly trained commandos). This mission started at 6:30 AM and was successful. The US casualties on this mission to this date was 6603 soldiers.
Overnight parachute and glider landings began D-Day invasion, and their main mission was to push Germany east. In order to liberate France.
The American forces stormed the Omaha beachhead in Normandy, as well as attacked numerous fortified positions inland with paratroopers.
June 6, 1944, is the day the invasion landings began on the beaches. Some Paratroopers landed late on June 5th.
the DC3 was primarily a cargo plane named the c47. It was also used to drop paratroopers and tow manned gliders for the D-Day invasion.
yes they still do there are many active paratroopers on active duty still to this day.
Paratroopers
The paratroopers landing inland
invasion day
With the dropping of 101st and 82nd airborne divisions paratroopers