Cap Patches
The airborne and glider troops wore identifying patches on their garrison caps (not HBT caps, etc). At the beginning of the War, they had their own separate patterns, each of which was color coded for infantry (blue) or artillery (red). Later in the War, a more practical combined airborne/ glider troop cap patch was issued to simplify matters.
Enlisted personnel wore the patch on the left front of the caps while offciers wore theirs on the right.