I believe it would be a great idea to have an attack log that shows who has attacked or spied members in a tribe as well as actions by your tribe against other players. This way all members of the tribe can see who we need to attack or beware of. In these logs it should show the troops used in attacks and spy missions. This works great in other games and helps the leaders make attack plans.
I hope you will consider this in the game. It may help keep people stay and play the game longer. Elevating the need to keep starting new games every couple of months. Too many games ran off of the same server (without merging them) cause glitches, lag and other issues in the game.