Spidey;
I'd take those two warriors over any US/ Brit / Aussie special forces anyday. By the way, are you sure they are from the PHils or another country like Borneo or ?
if im not mistaken those guys were kalinga or ifugao headhunters
There is an American soldier (U.S. cavalry trooper?) with a krag carbine just to the rear of the second warrior on the right of the picture. So definitely these guys are Philippine, sometime in 1899-1905.
The shields, the trousers, and the arms are moro.