The Israeli army has intensified its ground offensive in southern Lebanon, deploying a fourth division in its fight against the Islamist Hezbollah militia. A division is a large military unit composed of several brigades and typically includes thousands of soldiers. The army said the 146th Reserve Division has been operating in the western sector of southern Lebanon since Monday. Prior to the massive increase in fighting in the region, areas along the western section of Israel’s de facto border with Lebanon were designated as closed military zones. Reports indicate that three other Israeli div…