Sunda is located in the western part of Java. Its only neighbour is 满者伯夷.
Neighbouring a hostile, stronger 满者伯夷, Sunda is truly a rather difficult nation to play. In order to survive, the player must narrow the development between the two nations by conquering the animist states of Sulawesi and possibly even 库泰. It is probable however, that once one's troops are besieging 望加锡, Majapahit will declare war. Hence, it is important that the player builds a strong navy from day one that is capable of transporting the entire army around. In case of a DOW during a war in Sulawesi, the player must keep calm, take loans (if necessary) and hire mercenaries to scorch the earth in Sundanese lands. This will give Majapahit's forces massive attrition, and waiting a while for them to drain their manpower will help lots. Check the ledger often to see Majapahit's remaining strength.
The player should annex and convert Makassar, then proceed to fabricate claims on 鲁乌. The Majapahit war will be raging however, and hence the player should conduct a naval landing on Java and stackwipe the Majapahit, forcing them to recruit mercenaries. By this point, the war is practically won, as Sundanese troops are still not too tired while Majapahit's are weary and exhausted. Take as much land as possible and can core, and peace out.
By this point, Sunda has left the most difficult part of its existence. Attacking Kutai will be very useful for the development, and proper deity selection can allow Sunda to convert Borneo to Hinduism. Repeated steamrolling of Majapahit will leave Sunda undoubtedly the greatest power in the region.