 
The Rapier and Main Gauche was a sword-and-dagger combination. It was the Close-Range weapon of the Musketeer.
Description
The rapier is a long, thin-bladed sword with a sharp edge to prevent the weapon from being grabbed. The swept hilt protected the user's hand. The Main Gauche (French for "left hand") was a dagger similar to, but shorter than the rapier.
Use
The rapier was a thrusting weapon carried in the right hand, while the main gauche was carried in the left and was primarily used for parrying the opponent's sword or for surpise strikes. They were the most popular sword and dagger of the Renaissance.