Empires and Allies is a Clash of Clans–style real-time strategy game where you have to build your own military base and lead an army made up of all different types of units: foot soldiers, planes, tanks, etc.
The gameplay in Empires and Allies is almost identical to that of Clash of Clans. You have to manage an operations base where you can build all sorts of structures, including oil deposits, gold stores, weapons stashes, and barracks to recruit soldiers.
From your headquarters you recruit different troop types, some (like foot soldiers) weaker than others (like tank units). From your HQ you also launch the different missions that make up the story mode in Empires and Allies.
In these missions you attack enemy bases by deploying your troops over strategic points on the map. You can use your special abilities at any time, which can destroy large spans of enemy territory.
Empires and Allies is a good strategy game, and even if it doesn't add anything new to an already saturated genre, it still provides a good way to pass the time for anyone who loves the genre.