Complex sentence: The Orderly Departure Program office was initially established in Bangkok, Thailand in January, 1980, over the course of its work the ODP was able to assist nearly 500,000 Vietnamese refugees in resettling in the United States.
Split into simpler sentences: The Orderly Departure Program office was initially established on Bangkok, Thailand in January, 1980. Over the course of its work the ODP was able to assist nearly 500,000 Vietnamese refugees in resettling in the United States.