"In media res" means, freely translated, that we're starting with the fight scene already in progress.  We will worry about the 'why' of it, and possibly the 'who' of it, after the last mook is down.<br/><br/>Dominion Tank Police was a manga and an anime.  It was basically about giving a bunch of police tanks.  Think Police Academy meets Kelly's Heroes and you'll have the right idea.  Not at all a serious story.<br/><br/>Masamune Shirow is a very famous manga artist who has given us a number of kickass cyberpunk classics.  Ghost in the Shell, Appleseed, Dominion Tank Police, and Orion are the four that spring immediately to mind.