- +1 Attrition for enemies
- +50% Hostile Core-creation cost
- +10% Infantry combat ability
- +1 Yearly prestige
- +20% Fort defense
- +25% National manpower modifier
- −10% Core-creation cost
- +1 Yearly legitimacy
- −5% Technology cost
- +10% Morale of armies
Dai Viet is a mid-sized country in Southeast Asia. In 1444, they border Ming, Champa, and Lan Xang. If they can maintain their independence from Ming they have the potential to expand greatly in the region and colonize the rich islands around them.
Vietnamese minor states
Le Nghi Dan's Reforms
Emperor Le Nghi Dan has proposed various reforms concerning the government and the economic well-being of our kingdom. While many of these proposals make great sense, they will also be expensive and may cause unrest. What shall we do?
The Rivalry of the Mac and Trinh Families
Two great families vie for the power of regent of this nation, the Mac and the Trinh. Because of this power struggle, the nation has slid into anarchy, with armed bands supporting one side or the other roaming the countryside. We can only hope that their feuding will end soon.
The Tay Son Rebellion
After years of corruption, mismanagement, and famine, the people of our nation have apparently had enough. They have risen up in rebellion under the leadership of the Tay Son brothers. What shall we do?
||Mean time to happen
Crush the rebels
Negotiate a peaceful settlement
This section may contain outdated information that is inaccurate for the current version of the game. The last version it was verified as up to date for was 1.19.
Depending on the player's goals, Southeast Asia allows fast early expansion through vassalizing smaller neighbors, colonizing and eating apart a crumbling chinese empire in the north. Several nations in Indochina can be quickly vassalized in one or two wars.
Dai Viet begins with three directions to expand: west into Lan Xang, south into Champa or north into Ming, the last of which is highly recommended when Ming collapses to rebels by any chance. Its the only Mahayana country in the game, and its national ideas are made to play defensive. They're specially useful stacked with Defensive ideas and the Tropical terrain of this region. If a human player picks any of the 'Big four' of Southeast Asia (Ayutthaya, Dai Viet, Khmer or Lan Xang) two of them will pick you as a rival plus a minor nation. So for Dai Viet, it is usually Ayutthaya, Champa and Khmer/ Lan Xang.
The first thing that the player should do, besides picking rivals, is to set a plan: Stay in the continental area of Indochina or colonize the islands around and defend the continental territory. As already stated, the player will have to choose between Lan Xang or Khmer as an ally. Whatever the decision is, the second thing to do is attack Champa and vassalize it as soon as possible. In this war, try to blockade Vijaya with all your fleet and transport troops to Qi Non to carpet siege. After this short war, now you have to pinpoint to Khmer or Lan Xang, independently of your alliances. Looking out for allies outside Indochina, Malacca is a good choice, since it usually rivals Khmer and Ayutthaya.
Always try to attack Khmer or Lan Xang while they're on war with Ayutthaya. Depend on who you ally, Ayutthaya will attack the other within 30 years, join the fray and collect free loot. Once the Lao and Cham areas are under the Vietnamese control, further conflict with the Thai will be unavoidable, but an alliance with another neighbor, like Malacca or a unified Burmese kingdom, can usually dismantle or severely weaken Ayutthaya. If the player wishes to refrain from successive wars to recover from war exhaustion and manpower loss, colonizing can be an option.
The player's trade power share in capital's trade node Canton is relatively small and it is thus advisable to take a province in the Malacca trade node from Ayutthaya during the course of the first war. Once Lan Xang and Ayutthaya are out of the picture, focus effort on Malacca and take over Malacca trade node. Taking Johor and Siak in the first war so you can cross the strait in subsequent wars. If Malaysia is united or they ally each other, you might want to develop the province of Ayutthaya to get institution (Right of Man DLC required), and out-tech them, as they usually have a much larger army.