If you have mutual war declarations with another realm, prestige gains are increased by 25%, up from 15% for a one way declaration. In addition, a mutual war declaration gives 10% offensive strength bonuses and 10% increased landgains. Most importantly for prestige though, during times of mutual war declaration, players will receive small amounts of prestige for spy and magical attacks against other dominions involved in the war, ASSUMING those operations actually do a moderate amount of damage. Thievery operations, however, will never give prestige. The tech tree is a map of advancements that your dominion can obtain as you grow in size. You can obtain technical advancements by reaching appropriate levels of research points. The costs of each advancement will scale with your land size, and has a minimum of 3780 points. Some advancements require others before you can select them. Please consult the tech tree below. If you pick a tech that has the same, but higher, bonus as another tech, as several do, only the highest technology bonus counts. It overrides the lesser bonus (they do not stack). For example, Military Genius adds +5% to attack power, and Magical Weaponry provides +10% to attack power. If you obtain both, only the 10% bonus would apply. You can find a link to your technological advances on the Improvements page.