In modern terminology the Arkansas toothpick is a heavy dagger with a 12–20-inch (30–51 cm) pointed, straight blade. The knife can be used for thrusting and slashing. James Black, the inventor of the Bowie knife, is credited with inventing the Arkansas toothpick.
A dirk is a long thrusting dagger. Historically, it was a personal weapon of officers engaged in naval hand-to-hand combat during the Age of Sail, as well as the personal sidearm of the officers of Scottish Highland regiments, and Japanese naval officers.
Trench knife. A trench knife is a combat knife designed to kill or gravely incapacitate an enemy soldier at close quarters, as might be encountered in a trenchline or other confined area. It was developed in response to a need for a close combat weapon for soldiers conducting assaults and raids on enemy trenchlines during the First World War.