Complex sentence: Upon meeting Asterix and Getafix, Caesar hears of Crismus Bonus' intentions against himself; deports Crismus Bonus and his garrison to Outer Mongolia; and frees Asterix and Getafix for giving him the information, while reminding them that they are still enemies.
Split into simpler sentences: Upon meeting Asterix and Getafix, Caesar hears of Crismus Bonus' intentions against himself. He deports Crismus Bonus and his garrison to Outer Mongolia; and frees Asterix and Getafix for giving him the information, while reminding them that they are still enemies.