In End of Nations, you will have to complete missions that will, at the same time, give you the chance to unlock new units, weapons and even technologies. At any time, you can jump right into a battle that is taking place. Whether you go against your enemies alone or alongside other commanders against the Order of Nations and for every battle won, you will gain experience points. This way, you can expand your army, improve your headquarters and climb through the ranks.
The farther you come along in End of Nations, the more tactical options you will have available to you. Every unit has their own strengths and weaknesses, which you will have to know in and out if you wish to master the battlefield. However, you must keep in mind that you can never be too sure of yourself as an attack could come from anywhere at any time. If you focus too much on troops for just one attack, you could quickly find yourself on the losing end if an attack were to come with units that you were unprepared for.
Raw materials also play an important role in End of Nations. You must capture and conquer areas that are rich in these materials in order to secure them for your growing army. These resources are needed to upgrade your headquarters, build more units and improve your technologies. If you do not have resources, you will not be able to wage war against the tyrants.