CAIRO — Israel said Wednesday it was readying troops for a potential ground incursion into Lebanon, telling soldiers to prepare to “enter enemy territory” as it called up more reservists and sent world leaders scrambling to prevent a full-scale war with Hezbollah militants.

       “We are preparing the process of a maneuver,” the Israeli military chief, Lt. Gen. Herzi Halevi, told troops at an exercise along the northern border, “which means your military boots ... will enter enemy territory.”