wow, just wow.
nice war simulator with very well done graphics and a large pool of usefull and interesting units.
the only two things i could think to improve would be a feature that when a turret or tower - or any other unit that has to be placed by hand on the battlefield - is ready to drop a small window or signal would appear that tells you that the structure is complete. the other improvement would be that the current battlefield would give different types of units bonuses or penalties.
here some examples:
#1 infantry: a rain forrest could give the infantry a health boost because the terrain allows them to take cover, while the desert would give them a penalty on health for that it makes it difficult to hide from enemy shells.
#2 artillery: the rain forrest could give artillery units a penalty on speed because the muddy terrain impedes their improvement, while mountain-like terrain could give them a bonus on range for it allows them to take advantage of higher grounds.
#3 aricraft: any terrain with forests could give them a penalty on damage against land based units. against infantry the penalty would be higher than against artillery because for smaller units it is easier to take cover in such enviorments. vice versa they would gain the same but as bonuses on plain battlefield because the enviorement negates any chance to hide from attacks from above.
and yeah, one last thing but that goes to all who use the z-key to execute an action. please make it possible to use instead the y-key. i'm coming from germany and on our keyboards the z-key is at yours y-key's position. in this game it is not so neccesary because you just use the mentioned key for fast scrolling but nevertheless: it would just be make the whole game more comfortable to play for users from other regions.
so all in all: awesome game. i'm prettyy sure it will be on frontpage soon.