Complex sentence: On December 10 the Swedes brought in heavy siege artillery--two 24-pounders and 4 12-pounders, with 200 men; the Swedes finally had heavier calliber artillery than the defenders, albeit they still had fewer cannons than the monastery.
Split into simpler sentences: On December 10 the Swedes brought in heavy siege artillery--two 24-pounders and 4 12-pounders, with 200 men. The Swedes finally had heavier caliber artillery than the defenders, albeit they still had fewer cannons than the monastery.