Complex sentence: However, the French government also demanded the port town of Bangkok, and King Narai to be converted into Christian, at the same time sending 6 battleships and 500 troops to Ayutthaya.
Split into simpler sentences: However, the French government also demanded port town of Bangkok and King Narai to be converted into Christian. And they did so by sending 6 battleships and 500 troops to Ayutthaya.