Here are a few larger knives that I am am fairly sure were issued to our military servicemen during WWII.
The top is a 7-1/4" variant of the EGW (Ezra G. Waterman) knife. Stacked leather disc handle, no saw-back, and a triangle shaped notch behind the edge of the blade.
The middle blade is RCC (Robeson Cutlery Co.) Mark II knife. 7" blade, and stacked leather disc handle. The Mark II design later was informally known as a KA-BAR.
The bottom is the Cattaraugus 225Q. The blade is 6" long and the knife also has a stacked leather handle. The pommel has three layers of steel to secure the handle in place.

All three of these knives are very solid knives.