Complex sentence: Noting the command staff was exhausted from the continuous pressure of fending off kamikaze attacks, he ordered the command staff changed once again, this despite the fact that the mission had not yet been completed.
Split into simpler sentences: Noting the command staff was exhausted from the continuous pressure of fending off kamikaze attacks, he ordered the command staff changed once again. This order was made despite the fact that the mission had not yet been completed.