Complex sentence: Another crusade seems to have drawn Dixon away from New York in 1847; he was probably one of the first Radical Republicans to entrench himself in the Yucatán in a bid to annex more territory for the United States.
Split into simpler sentences: Another crusade seems to have drawn Dixon away from New York in 1847. He was probably one of the first Radical Republicans to entrench himself in the Yucatán in a bid to annex more territory for the United States.