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Royce Mission
U.S. Army Air Force bombers return to the Philippines for strikes April 12–13, 1942
Background
The "Royce Mission" led by General Ralph Royce with ten B-25C Mitchells from the 3rd Bombardment Group (3rd BG) led by Colonel "Big Jim" Davies and three B-17E Flying Fortress from the 19th Bombardment Group (19th BG) led by Captain Frank Bostrom flew from Australia to the Philippines for two days of bombing missions then evacuate military and diplomatic personnel to Australia.
Staging Flight to Mindanao
On April 11, 1942 the ten B-25C Mitchells each with a bomb bay fuel tan for extended range plus three B-17E Flying Fortresses fly from Batchelor Field near Darwin for the 1,500 mile flight northward to Del Monte Airfield on Mindanao arriving in the early afternoon with the B-25s dispersed at Valencia Airfield and Maramag Airfield. General Royce is aboard B-17E "San Antonio Rose II" 41-2447 to personally oversee the mission. One B-25 was stuck at Darwin and did not participate. For the next two days, the bombers flew strikes against the Japanese shipping and targets including Nichols Field on Luzon, Cebu Harbor and Davao.

April 12, 1942 (Strike No. 1)
On April 12, 1942 the nine B-25s from Mindanao bomb Japanese shipping in Cebu Harbor. Two B-17 conduct single-bomber strikes against Cebu Harbor and Nichols Field on Luzon. The third B-17E "San Antonio Rose II" 41-2447 remains parked at Del Monte Airfield.

April 13, 1942 (Strike No. 2)
On April 13, 1942 the nine B-25s from Mindanao bomb Japanese shipping in Cebu Harbor and installations at Davao on Mindanao.

While parked at Del Monte Airfield, the three B-17s were spotted and bombed. B-17E "San Antonio Rose II" 41-2447 was hit by a 60kg bomb and destroyed. The other two B-17s also sustained damaged including B-17E 41-2421 and B-17E 41-2486.

April 13, 1942 (Strike No. 3)
On April 13, 1942 later in the day, B-25s again bomb the dock area at Davao.

Return Flight to Australia
Afterwards, the bombers were loaded with military and diplomatic personnel assembled at Del Monte Airfield. The evacuated personnel include Chinese Lt. Col. Chih Wang. After dark, the remaining bombers took off from Mindanao for the flight back to Australia with the B-25s landing safely on April 14, 1942 at 3:00am at Batchelor Field near Darwin.

Aftermath
The Royce Mission was a success because no American aircraft or personnel were lost flying the combat missions. The only aircraft lost was B-17E "San Antonio Rose II" 41-2447 destroyed while parked on the ground. Afterwards, the "Royce Mission" made the front page of the New York Times but was soon overshadowed by news of the April 18, 1942 "Doolittle Raid" led by Col James "Jimmy" Doolittle when B-25 Mitchells bombed Japan.

References
Air Base Headquarters Del Monte April 13, 1942 via Gus Breymann
CYPHER Message To: U.S.A.F.I.A. Melbourne From: Batchelor April 14, 1942 3:00am via Gus Breymann
"Attention General Brett from Hipps (.) 9 B 25's returned Australia 0300Z/14(.) Tenth believed gone south (.) Will be confirmed later (.) General Royce en route Melbourne with complete report (.)"
Oz@War Major-General Ralph Royce United States Air Corps (USAC) in Australia during WW2
Fortress Against The Sun (2001) pages 164–166 (Royce Mission)
Thanks to Gus Breymann (nephew of 2nd Lt. Gustave Heiss) and Edward Rogers for additional information

Are you a veteran or relative of a Royce Mission crew member?
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