Complex sentence: Polson had three to four hundred regulars from the 60th and the 79th Regiments, about 300 men from the Loyal Irish Corps--raised by Dalling--and several hundred local recruits (including blacks and Miskito Indians).
Split into simpler sentences: Polson had three to four hundred regulars from the 60th and the 79th Regiments and about 300 men from the Loyal Irish Corps, raised by Dalling. There were also several hundred local recruits (including blacks and Miskito Indians).