Complex sentence: After the war Coffin raised more than $100,000 in one year for the Western Freedman's Aid Society to provide food, clothing, money, and other aid to the newly freed black population in the United States.
Split into simpler sentences: After the war, Coffin raised more than $100,000 in one year for the Western Freedman's Aid Society to provide aid to the free blacks. The Society provided food, clothing, money, and other aid to the newly freed slave population in the United States.