Most of the units you produce can be upgraded to something more powerful than before. But, you have to know which units are actually worth the money to produce, maintain, and upgrade. Here is a list of ranks.(not including C3C)
1.Horseman, knights, cavarly
The best units in the game, with the best attack of their time and the fastest attack.
2.Tanks, MA
Really worth the time to sit and upgrade all of them...Very good attack.
3.Spearman, Pikeman, Musketman, Rifleman, Inftrary(exesue my spelling Oops...) MI
I really suggest you don't upgrade musketman into rifleman because it's a waste of money(dosen't really matter because cavarly will kill both of so easily...)But they're the best defenders and should be used to guard cities and important resources.
4.Swordsman, Medievial I, Gurreallia
Worst investment in land forces, it becomes worthless after swordsman, it becomes a waste of money.
5.Galley, Caravl, Galleons, Transports
What can I say, they're pretty useful but dosen't have to upgraded lik galley have the same movement as Caraval but can't go through ocean squares.
5.Galley
1.Horseman, knights, cavarly
The best units in the game, with the best attack of their time and the fastest attack.
2.Tanks, MA
Really worth the time to sit and upgrade all of them...Very good attack.
3.Spearman, Pikeman, Musketman, Rifleman, Inftrary(exesue my spelling Oops...) MI
I really suggest you don't upgrade musketman into rifleman because it's a waste of money(dosen't really matter because cavarly will kill both of so easily...)But they're the best defenders and should be used to guard cities and important resources.
4.Swordsman, Medievial I, Gurreallia
Worst investment in land forces, it becomes worthless after swordsman, it becomes a waste of money.
5.Galley, Caravl, Galleons, Transports
What can I say, they're pretty useful but dosen't have to upgraded lik galley have the same movement as Caraval but can't go through ocean squares.
5.Galley