There might have been enemy action at the air base, which may or may not have been close to the front lines (for example in North Africa). He may have rushed to fight a fire after incendiary bombing or pulled somebody from wreckage. Phrases like “with reckless disregard for his own safety” are often attached to Silver Star commendations.

My grandfather was awarded five bronze service stars and one star noted with air combat. Interesting that he was in the same countries as your grandfather above. Add, France for my grandfather. Check his paperwork. His DD-214 should note more specifics on where he served etc. Many records were burned in the 1973 warehouse fire but as a descendant you can ask for a copy of his medical records and you may find a copy of his DD-214 in his med folder and get more specifics on his disability and service.

My grandfather served in the US Army Air Corps, First Emergency Air Rescue Squadron (Forerunner of the PJ's). The airmen that flew behind the lines to rescue downed pilots. His job was as an aircraft Sheetmetal mechanic and he was an expert on the 30 cal? if I recall. May explain the air combat note?

I suggest you bring whatever documents you can accumulate and take them to your local Congress office. They have access to the pentagon that you and I don't. If the records weren't burned in the fire, you may get your answers.

North Africa and Sicily were horrible. Lots of mistakes and losses. Whole units wiped out or captured

The Navy shot down like 20 something planes full of US Army paratroopers. I think that an entire Ranger Battalion was captured