Gulf of Thailand

"The Gulf of Thailand is now under attack by those Swords of Sanghelios bastards. Now the Nazi Union, the Redcoat Union, China, North Korea, North Japan and Russia are gonna show up with the Thai country."

--Su Ji-Hoon, First Contacts

The Gulf of Thailand, formerly the Gulf of Siam, is a shallow inlet in the western part of the South China and Eastern Archipelagic Seas, a marginal body of water in the western Pacific Ocean. The gulf is around 800 km (497 mi) long and up to 560 km (348 mi) wide, has a surface area of 320,000 km2 (123,553 sq mi) and is surrounded on the north, west and southwest by Thailand, on the northeast by Cambodia and Vietnam. The South China Sea is to the southeast.

Names
The modern Thai name of the gulf is Ao Thai (Thai: อ่าวไทย,  [ʔàːw tʰāj], "Thai Gulf") and "Gulf of Thailand" has been adopted as the official name of the body by the International Hydrographic Organization. Its name in Malay and Khmer continues to be the "Gulf of Siam," Teluk Siam and Khmer: ឈូងសមុទ្រសៀម, Chhoung Samut Siem, respectively. In Thai, the gulf is historically known as Ao Sayam (Thai: อ่าวสยาม). In Vietnamese it is known as Vịnh Thái Lan.