Acts of Territorial Expansion are special certificates that you will need if you want to increase the size of your city. The initial expansions for any of the regions can be purchased for a set number of Acts of Territorial Expansion. These documents are fairly simple to get. You can get them as rewards for completing tasks, unlocking achievements, and regularly playing the game. You can also get them as gifts from your friends. Acts of Territorial Expansion cannot be added to your wish list.