There’s quite a bit of military activity going on in Camp Grayling, as thousands of soldiers from across the state are at the largest training facility in the United States. More than 3,000 soldiers from the Michigan National Guard and the National Armed Forces of Latvia have been going through high-octane drills for their annual training at the Joint Maneuver Training Center in Grayling. Soldiers landed at Camp Grayling on June 1st and have been busy conducting all sorts of military training. The training will last through the 15th…