sentences:  The 118th Field Artillery (GA ARNG), which traces its lineage to militia units from Savannah and surrounding Chatham County that served in the War of 1812, is one of only nineteen Army National Guard units with campaign credit for the War of 1812.The Militia Act of 1903 organized the various U.S. state militias into the present National Guard system.The 121st and 122nd Infantry Regiments, formed from existing Georgia state regiments, formed the 61st Infantry Brigade of the 31st Dixie Division mobilized for World War I.