The “Kings of Battle” are heading downrange. First Battalion, 12th Marines, out of Marine Corps Base Hawaii, deployed to Afghanistan during the last week of April. The artillery unit reported Tuesday on its Facebook page that Alpha Battery had arrived in Kyrgyzstan, the assumed last stop on their trip before reaching the war zone. About 500 Marines with 1/12 will replace 1st Battalion, 10th Marines, out of Camp Lejeune, N.C., which has served as the Corps’ primary artillery battalion in Afghanistan for all of 2011, Marine officials said. Elements of 1/10 also have patrolled Kajaki, a volatile district to Sangin’s…