Complex sentence: This action was never adequately explained, as the Royal compound and Ayutthaya proper was located on an island; how Taksin and his followers fought their way out of the Burmese encirclement remains a mystery.
Split into simpler sentences: This action was never adequately explained, as the royal compound and Ayutthaya proper was on an island. How Taksin and his followers fought their way out of the Burmese encirclement remains a mystery.