As Codger-64 says; it was developed as a USA soldier ration during WWII. In Canada there is a version of this called Kam (same keyed tin and similar ingredients) and I noticed the Ojibway-Cree Natives of northern Ontario (in around James Bay/Hudson Bay) pack this stuff with them all the time when they're out on the land. Sliced and warmed in a fry pan and eaten with bannock (native version of non-yeast bread) and accompanied by a steaming mug of tea. Considered standard trail fare because I found the empty cans everywhere along snowmobile trails and beachheads during the 3/4 year I lived up there as a school teacher. You can similarly buy tins of Brazilian corned beef for packing with you on hikes. I've personally always been a sucker for cans of sardines on hikes and trips but that requires packing along some bread or buns too.