[Postcard of a Man Sitting on an Airplane]

Postcard of a man sitting on top of the engine of a Douglas O434 observation airplane at Camp Hulen. There is another man leaned over the side of the engine, apparently performing some maintenance on the plane.
Date: 1939~
Creator: unknown
System: The Portal to Texas History

[Pratt and Whitney Radial Engine]

Postcard of a Pratt & Whitney radial engine on an aircraft.
Date: 1939~
Creator: unknown
System: The Portal to Texas History

[Postcard of Three Military Aircraft]

Postcard of multiple aircraft parked at Camp Hulen. The two aircraft on the left side of the image are two North American O47A aircraft of the 111th Observation Squadron, with the "Ace in the Hole" insignia on both fuselages. The aircraft on the right is a North American BT-9 possibly from Randolph Field.
Date: 1938~
Creator: unknown
System: The Portal to Texas History

[Postcard of Artillerymen with a 105 mm. Howitzer]

Postcard of artillerymen of the 36th Division of the Texas National Guard training with a 105 mm. Howitzer cannon.
Date: 1939~
Creator: unknown
System: The Portal to Texas History

[Postcard of Governor O'Daniel Reviewing National Guardsmen]

Postcard of Governor W. Lee O'Daniel (in light suit) inspecting the Texas National Guard troops at the end-of-summer grand review at Camp Hulen.
Date: 1939~
Creator: unknown
System: The Portal to Texas History

[Postcard of Artillerymen with a 105 mm. Howitzer]

Postcard of artillerymen of the 36th Infantry Division training with 105 mm. Howitzer cannons.
Date: 1939~
Creator: unknown
System: The Portal to Texas History