Today in WW II: 19 Apr 1941 British troops sent to Iraq.  More 
19 Apr 1943 On the first day of Passover, 2000 German troops marched into the Warsaw Ghetto to round up remaining Jews but were attacked and routed by the residents.
19 Apr 1944 Japanese launch Operation ICHIGO, the first Japanese ground offensive in China since December 1941.
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Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF)

The Oshkosh P-4 6x6 Truck, Airport Rescue Fire Fighting (ARFF) had a 1,500 gallon capacity and a 500 gpm pump. A variation of the P-4 called the P-4A was also procured. The U.S. Air Force bought more than 500 P-4s in the early 1970s and P-4As were purchased by both the U.S. Navy and the Australian Air Force.

Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) at a flight line fire during Exercise Thunderhog V, Myrtle Beach AFB, SC, 4 November 1983
Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) at a flight line fire during Exercise Thunderhog V, Myrtle Beach AFB, SC, 4 November 1983.

USAF 437th Military Airlift Wing firefighter in a proximity suit and an airman seated in the cab of a Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) during exercise Camille, Melville Hall Airport, Dominica, Caribbean, 3 May 1987
USAF 437th Military Airlift Wing firefighter in a proximity suit and an airman seated in the cab of a Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) during exercise Camille, Melville Hall Airport, Dominica, Caribbean, 3 May 1987.

USAF 437th Military Airlift Wing firefighter in a proximity suit with Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) during exercise Camille, Melville Hall Airport, Dominica, Caribbean, 3 May 1987
USAF 437th Military Airlift Wing firefighter in a proximity suit with Oshkosh P-4 Truck, Airport Rescue Fire Fighting (ARFF) during exercise Camille, Melville Hall Airport, Dominica, Caribbean, 3 May 1987.