As the alliances are becoming more and more active, we are working on things that will make massive interactions easier and provide better defense. This new building does both.
Today we added the Tavern. This new building is accessible at the end of Classical Age through the Currency Tech. The Tavern will improve the speed of reinforcements sent from the town that holds the building. It does not really matter if you send reinforcements to your other towns or to someone else's, it will speed up the army (on their way there). The return time, however, is unaffected. At level 20 this building can speed up reinforcements by a whopping 3 times!
The main reason for adding this building is so it can be used in conjunction with alliance Commander features when the Commander detects an enemy invasion and tries to relocate troops of nearby members to reach the attacked town in time. With the Tavern level maxed, roads built, high awareness achieved by the attacked player, and prompt reaction of the Commander, this can be done in time.
Of course there are also other positive effects, such as defending yourself more easily in 1 vs 1 attacks, and sending your troops here and there faster.
Let us know if it can help your playstyle and how.