Some grudges are issued as part of the story and are not triggered by actions in-game. But they can accumulate very, very easily. When combating an army that has a significant amount of cavalry or units designed for flanking, Underway battles make it nearly impossible to be flanked and renders that segment of your enemy's army ineffective.
A stable gunline defense, small mobile units to counter thrusts, and precise application of fire support are the name of the day - but require careful tactics, as they can easily be undone by flanking or baiting maneuvers. Emphasizing stable defensive lines, overwhelming firepower, and steady advances over brilliant maneuvers, Dwarfs require a patient hand and a defensive mind.
Roster of heavily-armoured units with strong leadership and a variety of deadly war machines.