The british airborne forces from 1940 to 1945.

Website of the 517th Parachute Regimental Combat Team.

History of The Parachute Regiment and Airborne Forces

The VI Corps Combat Engineers small units history.

Official - 509th Parachute Infantry Association 

Official - 551st Parachute Infantry Association

Official Home of the 463rd Parachute Field Artillery

US Naval History and Heritage Command