Hello !
The “Warlord” achievement will not unlock, but it is stuck at 33%. I’ve win on all maps like the achievement asks.
Have you a solution please ?
Thanks ! 
Same problem since two months…if you search ‘warlord achievement’, there are some users explaining how they unlocked it, but it didnt work for me… If you discover another way, please post it. I hope you dont get so fustrated as i am. good luck! And excuse my bad english 