Complex sentence: This was not a formal title or office carrying any rights as such and was certainly not inherited or even maintained within a kingdom, most Bretwaldas had to fight individually for overlordship; violence should never be overlooked in Anglo-Saxon politics.
Split into simpler sentences: This was not a title as such and was certainly not inherited or even maintained within a kingdom. Most Bretwaldas had to fight for overlordship; violence should never be overlooked in Anglo-Saxon politics.