The Philippine claim can be originated based on three historical events; such as the Brunei Civil War from 1660 until 1673, treaty between Dutch East Indies and the Bulungan Sultanate in 1850 and treaty between Sultan Jamal ul-Azam with Overbeck in 1878.
The Philippine claim can be originated based on three historical events; such as the Brunei Civil War from 1660 until 1673 treaty between Dutch East Indies and the Bulungan Sultanate in 1850 and treaty between Sultan Jamal ul-Azam with Overbeck in 1878