Complex sentence: Three days later, it sailed from Sasebo to Pusan, South Korea, aboard the ferry "Koan Maru" to join the Eighth Army Ranger Training Center, also newly formed, for seven weeks of specialized training.
Split into simpler sentences: Three days later, it sailed from Sasebo to Pusan, South Korea, aboard the ferry "Koan Maru". Upon arrival, the company was sent to the newly established Eighth Army Ranger Training Center for seven weeks of specialized training.