Complex sentence: Due to the fact that Alaska did not become a state until 1959, the Alaskan Natives were passed over as termination policy formed in 1953, and the fervor for termination faded before Alaskan Natives came into discussion.
Split into simpler sentences: Due to the fact that Alaska did not become a state until 1959, the Alaskan Natives were passed over as termination policy began in 1953. The fervor for termination faded before Alaskan Natives came into discussion.