I've noticed that random item drops (ie those not from bosses) during the campaigns in Dawn of War II / Chaos Rising / Retribution seem to usually happen during heavy fighting.
My theory is that they're triggered by dishing out a particularly high rate of damage (since I've noticed the drops seem to happen more often when I triggering multiple abilities), but it would be nice to have some confirmation of this.
So, is it known exactly what triggers random drops, and if there's anything that can be done to increase the drop rate?
Or is there just a random chance of any given kill dropping an item?