During the riot scene at the "embassy," the firefighter hosing down the crowd has LBFD on his turnout coat. That likely stands for Long Beach Fire Dept. The embassy is presumably located in New York which would have NYFD firefighters. (Embassies are ALWAYS in national capitals, such as Washington DC. If a foreign government has representatives in another city, such as NYC, it would be as a consulate, not an embassy.)
During the montage of Mellish training with the rebels he is standing in the chow line with a plate. When the cook dished out his meal, the overhead shot shows Mellish holding an army style mess kit. In the next scene he asks "What the hell is this stuff anyhow?" and he is back to eating off the plate.