Here's a rule that came up in last game. Also question from nearby players.
JJ typing, Morale; When to Test 40k6 pg 29 first bullet point
*Casualties: A unit losing 25% or more of its current models during a single Movement or Shooting phase must take a Morale check at the end of that phase.
Next turn, the unit, now three strong, suffers a single casualty from a Dangerous Terrain test in the Movement phase, which is now enough to for it to have to take another Morale check.
Context: Opponent moved Jetbikes onto objective which was in Difficult Terrain. Lost one jetbike due to Danger Terrain test. Informed about losing 25% and having to roll Morale. He said that is for shooting only. Was curious looked it up. Moving and Shooting. There's even an example. This is a Huge rule to learn. Imagine there are many players that don't run it in Movement.
Sweeping Advances 40k6 pg 27 first bullet point
*If the winner's total (Initiative + dice roll) is equal to or greater than the foe's, the falling back unit is caught by the Sweeping Advance and destroyed.
Context: Shawn's boy Aiden asked us this rule while we were playing. His boys were playing Tau and Orcs. There was a huge mosh pit of Orc and Tau involved in close combat. Don't have the specifics where the question was coming from. Off topic a little bit. Orcs assaulted Crisis Suits. Some 60 shots due to Supporting Fire were shot and only three 6's were rolled. Damn.