The United Asiatic Coalition

History
After a devastating war (which I'll write about later,) several countries in SE Asia and Polynesia joined for the purpose of aiding in each other's survival. Think the Ancient Greek states- different laws, different customs, not-so-friendly competition, but they more or less work together and they have a little control over each other.

Government
Each province of the UAC has its own system of governance, but most follow the system of true democracy- with the simultaneous advents of mass media and portable technology, it is now feasible to eliminate the representatives and have each citizen vote individually.Relations between provinces are overseen by a council composed of three representatives elected from each province. Citizens can travel freely between provinces, but foreigners must register at each respective embassy. Diplomacy between the UAC and other countries is conducted by designated ambassadors.

Military
The UAC has an unusually large standing army. Similar to modern-day Israel, all citizens are drafted at the age of 18 for up to three years, depending on their individual status (gender, family, etc.) Those who choose to stay in the military are heavily augmented and enroll in the UAC-EM, or Elite Military. They are the most renowned soldiers on the planet, but their turnover rate is exceptional. Ex-EM troops are coveted as private security and mercenaries.

Citizens/Society
The main cities of the UAC, namely Singapore (the government capital) and Jakarta and Manila (population and culture centers) are highly cosmopolitan. In contrast, much of Polynesia is unchanged or even diminished, being the agricultural breadbasket of the nation. These "high islands" produce large quantities of coconuts, pineapple and yams, meaning that the UAC is one of the only nations who grows significant amounts of non-lab-grown food.

Borders
The UAC "owns" the peninsula which includes Thailand, Laos and Cambodia, Singapore, Indonesia, Papua New Guinea, the southernmost islands of Japan (disputed,) and parts of Micronesia.

Allies Many trade allies, but very few politically or militarily. Sometimes in conflict with Japan over the islands of Okinawa and Kyūshū.