Marines in at least two more units downrange this summer may be home in time for turkey. Second Light Armored Reconnaissance Battalion, out of Camp Lejeune, N.C., has been replaced in Afghanistan by 1st LAR, out of Camp Pendleton, Calif., Marine officials in Afghanistan said. They’ll likely continue the mission LAR units have manned for years, patrolling the deserts of southern and central Helmand province to prevent insurgent movement and activity. Echo Battery, 2nd Battalion, 12th Marines, out of Marine Corps Base Hawaii, also is heading home, officials said. The artillery unit will be replaced by Pendleton’s Echo Battery, 2nd…