Thalassocracy is a technology in Age of Empires II HD: Rise of the Rajas that is unique to the Malay and can be researched at the Castle. Once researched, it turns Docks into Harbors, thus making them able to attack.
On maps where control of the seas is important, Thalassocracy is an incredibly useful technology, as it helps greatly to secure the shoreline. Harbors are bulkier than regular Docks and are quite effective against ships, which also makes them a great offensive tool. If a Harbor is placed near an enemy Dock, unit production and fishing is extremely hindered. Naturally, Harbors can also help defending the own position on the map against military vessels as well as Transport Ships. As such, Thalassocracy should be researched as soon as possible on water-based maps.
- Majapahit was a thalassocracy only during the reign of King Hayam Wuruk. However, the quality of the navy as well as all of its military declined after his death due to continuous civil wars and purposed neglect by the monarchs. Thus, when the empire was defeated and taken over by Demak, it only ruled the eastern part of Java.
Thalassocracy is the term for a state who holds supremacy on the seas. The term was derived from the Greek words thalassa (sea) and kratia (rule). Thanks to the Malay Archipelago's abundant resources and strategic location, maritime kingdoms such as Srivijaya began to spring up in this region several centuries ago. Vessels plying the India-China route would stop at their ports to trade and replenish their supplies before continuing their journey to China or India.