The Military is a force of many soldiers which possibly represents an alliance of nations against Dracula. The military sent many soldiers to Dracula's Castle during the Demon Castle War of 1999, which were lead by Julius Belmont. Many of the fallen became zombies wandering the castle walls.
The military sent one of their delegates, named Hammer, to investigate the Hakuba Shrine during a full solar eclipse in 2035; however, they didn't inform him what to expect and he ultimately found himself whisked away to Dracula's Castle sealed inside of the eclipse. Irritated, he abandoned his mission and instead decided to set up shop with all the weapons he was able to find in the castle and traded them with Soma Cruz, who would be responsible for getting him and others out of the castle.
After these events, Hammer quit the military and worked as an information broker through shady business contacts, as well as realizing his dream of becoming a merchant.