Complex sentence: In February 1913 Madero and his vice president Pino Suárez were forced to resign, were assassinated, and the counter-revolutionary regime of General Victoriano Huerta came to power, backed by the U.S., business interests, and other supporters of the old order.
Split into simpler sentences: In February 1913 Madero and his vice president Pino Suárez were forced to resign and were assassinated. The counter-revolutionary regime of General Victoriano Huerta came to power, backed by the United States, business interests, and other supporters of the old order.