A Trench Knife, or trench spike is a type of combat knife that saw use in the First and Second World Wars. A trench knife features either a double-edged blade or a simple metal spike, and as such, is designed primarily as a thrusting weapon. The trench knife also has a handguard that doubles as a set of metal knuckles, sometimes with small spikes, the idea being for the user to stun an enemy with the knuckleduster, then follow up with one or more rapid thrusting attacks with the blade. Trench knives were used by the Americans, British, and Germans in both World Wars, with the Germans issuing trench knives more widely in World War II, while the Allies were more likely to issue other types of combat knife, such as the KA-BAR.