Complex sentence: The Allies had about 11,000 men between Tacna and Arica; also, the new Bolivian President Narciso Campero managed to send another infantry division to Tacna.
Split into simpler sentences: The Allies had about 11,000 men between Tacna and Arica. Also, the new Bolivian President Narciso Campero managed to send another infantry division to Tacna.