Complex sentence: Liberal victories began in the battles of Peñuelas and Silao, liberals, beating the conservatives, had won decisively at the Battle of Calpulalpan December 22, in which the Conservative army was completely disintegrated.
Split into simpler sentences: Liberal victories began in the battles of Peñuelas and Silao. Liberals, beating the conservatives, had won decisively at the Battle of Calpulalpan on December 22, in which the Conservative army was completely disintegrated.