What is "warbags"

Usage examples of "warbags".

They'd stuffed their boots upside down into their jeans and stuffed their shirts and jackets after along with their warbags of shaving gear and ammunition and they belted the jeans shut at the waist and tied the legs loosely about their necks and dressed only in their hats they led the horses out onto the gravel spit and loosed the girthstraps and mounted and put the horses into the water with their naked heels.