Obviously I can't provide all of the information in Manchester's book here on a forum . MacArthur lost so few men because of his strategy . His retaking of the Phillipines is one example : His forces knifed into the Japanese, separating and confusing their units .
In taking Rabaul...wait ! Oh, right. He never took Rabaul, rightly judging it to be too well defended .
He bypassed some islands instead of taking one after another . He let the Japanese suffer malaria and starvation to weaken them before attacking . He used flank attacks . He thought everything out, employed sufficient forces, argued with his superiors for more resources and led from the front . MacArthur's incredible mind contained every scrap on information on Japanese order of battle etc.
There are no "maybes" about it.
Re : Your claim----- When did we kill our own troops in the Battle of the Bulge ?
My understanding is that we lost so many men in one battle due to second-rate troops defending a quiet area and surrendering easily, intelligence failure facilitated by Hitler's radio silence orders, German timing of the attack for bad weather to ground our air forces, German concentration with heavy tanks, surprise and SS ruthlessness / murders .