The Lebanese militia Hezbollah has traded fire with Israeli troops along the border since the day after Hamas’ Oct. 7 surprise attack in southern Israel sparked war in the Gaza Strip. Both sides have suffered casualties, but the fear is that the conflict will escalate and spiral into a regional fight. In his first public speech since the outbreak of the Israel-Hamas war, Hezbollah leader Hassan Nasrallah said Friday that the paramilitary force had “already entered the battle on Oct. 8” but stopped short of saying Hezbollah would more fully join the fight.