Complex sentence: Even with the most major differences of all of the houses, the use of the same structure has been a vital factor in combat as defending and attacking armies, this conformity has been thankful to military advisors and generals abroad.
Split into simpler sentences: Even with the most major differences of all of the Houses, the use of the same structure has been a vital factor in combat as defending and attacking armies. This conformity has been thankful to military advisors and generals abroad.