Complex sentence: With only a fraction of survivors at the location, Thomas plans an infiltration into WCKD and is determined to take them down to save his friends and save civilization, as his friends and the Right Arm agree to help and prepare to fight back.
Split into simpler sentences: With only a fraction of survivors at the location, Thomas plans an infiltration into WCKD and is determined to take them down to save his friends and save civilization. Thomas' friends and the Right Arm agree to help Thomas, as they prepare to fight back.