Complex sentence: As the six-month grace period passed on, he desperately sought alternatives to the ordered transfer, seeking unsuccessfully the intercession of King Savang Vatthana, of his American sponsors, and of his friend Kong Le.
Split into simpler sentences: As the six month grace period ran, he desperately sought alternatives to the ordered move. He unsuccessfully sought intercession by King Savang Vatthana, by his American sponsors, and by his friend Kong Le.