Bar Lev Line
During the War of Attrition, the corps took a more combat-ready approach, moving its training base to the newly captured territories (near Kedumim), and assisting combat units in training exercises. Between 500 and 1,000 prisoners were taken out of Prisons Four and Six to temporary camps in the Sinai to build the Bar Lev Line. This worked so well that a permanent detachment of prisoners remained at Rephidim Air Base (Bir Gifgafa) and assisted in various chores.