Couple qualifiers on 3 to 1 Kill Ratio: 1. Must kill at least 200 enemy units. 2. At least one of your units must die (only really problematic on easy). 3. Supposedly if you beat a Stronghold and qualify for multiple wargear you will receive only one piece, and will be unable to ever re-earn the wargear that should have been awarded (bug).
Grot Guided Bombs... Forget JDAMs; in the Grim Future of 40k they have UDAMs!