Actually guys, when Darius is trying to explain his "marine style" leap frog tactic, that's me, trying to explain an actual US marine combat tactic that is use by marines, SWAT... and lots of other military groups as a basic combat tactic.   But you don't have to take my word for it.  here (http://www.wolf-recon.com/Tactics/leapfrog.html) is one site that explains it simply.<br/><br/>Basically, using Rogue trader terms, the front group goes into "overwatch" and covers the back group while it takes a full round "move from one cover to the next" move (exact name escapes me) which essentially allows the to have their cover bonus the whole time.  So as both groups leapfrog forward, they both always have a cover bonus, and the ability to instantly respond to an attack, giving ambushers next to no advantage.  The designers of the game obviously knew of the tactic when writing it, as they put the individual combat actions needed into the basic combat rules.