The conflict lasted two weeks as siege engines and sappers (soldiers with engineering skills, including tunnelling) chipped away at the fortress’s defences.
Parhaodd y gwrthdaro bythefnos wrth i beiriannau gwarchae a thanseilwyr (milwyr â sgiliau peirianneg, gan gynnwys twnelu) naddu amddiffynfeydd y gaer yn ddyfal.