Today in WW II: 6 Apr 1941 Operation Marita: Germans invade Greece. More 
6 Apr 1941 Axis armies from Germany, Italy, and Bulgaria invade Yugoslavia; Luftwaffe bombs Belgrade.
6 Apr 1945 Yugoslav Partisans liberate Sarajevo from the troops of Nazi Germany who then withdraw from Bosnia.
6 Apr 1945 Japanese battleship Yamato and supporting ships sunk 200 miles [320 km] north of Okinawa while enroute there to relieve increasingly desperate defenders [6-7 Apr].
Visit the Olive-Drab.com World War II Timeline for day-by-day events 1939-1945! See also WW2 Books.

Checker Bantam Jeep

The full story of the development of the original Army Jeep of World War II is on the linked page. The 1941 agreement between Bantam and Checker Cab Company resulted in delivery of prototype units to the Army as seen in these surviving photographs of Checker-built Bantam BRC-40 jeeps.

Bantam BRC-40, produced by Checker
Bantam BRC-40, produced by Checker.

Bantam BRC-40, produced by Checker
Bantam BRC-40, produced by Checker.

Bantam BRC-40, produced by Checker
Bantam BRC-40, produced by Checker.