To live in a culture of proud warriors is to live in a society ultimately governed by its military. This is no less true in Klingon society, where the very notion of fighting for the glory of the Empire is something to which each and every citizen aspires!
The massive Klingon Imperial war machine is referred to as the tlhIngan Hubbeq, or Klingon Defense Force. Though technically a single fighting body, the Hubbeq can be divided into the logh yo' (navy), the mangghom (army), and the Hung (internal security). Further information on each of the three branches and the chain of command can be found in the links below, as well as much of the information a warrior should know to better serve the glory of the Empire.
Read it. Know it. Live it! tlhIngan wo' DaquvmoH!