We have WW style weapons with Infantry and Black Market lines, but for melee options nothing is really "old wartime" themed. There are knifes, but most are relatively modern designs. We have axes, but none are realistic axes (perfect shiny metal, techno, hologram, etc).

So when do we get a "tactical shovel" melee?

My bet is Episode 7 Act 2, as part of an Infantry MK2 set (Odin, Bucky, Vandal, Sheriff, melee?).