The Regiment Johan Willem Friso is a line infantry regiment of the Royal Netherlands Army. Named after Johan Willem Friso of Orange-Nassau, it is the oldest and most senior regiment in the current order of battle. The regiment currently serves in the mechanized infantry role as 44 Armoured Infantry Battalion (44Painfbat) as part of 43 Gemechaniseerde (Mechanized) Brigade. 44 Armoured Infantry Battalion JWF is deployed in Uruzgan, Afghanistan.