Complex sentence: After resuming work as a lawyer, and declining an offer to return to the U.S. Army as a colonel, he was elected as a Democrat to the 41st and 42nd Congresses (March 4,1869--March 3,1873).
Split into simpler sentences: After resuming work as a lawyer, and declining an offer to return to the U.S. Army as a colonel. Slocum was elected as a Democrat to the 41st and 42nd Congresses (March 4,1869--March 3,1873).