Eastern Roman Empire - Unit Upgrades

[The Seeker]

Hello everyone! Well I just researched a tech that allows Comitatenses Spears/Legio to be upgraded to Lanciarii Seniores and Legio Comitatenses, but actually nothing happened... not sure why, do you guys know the issue?
Thanks in advance!

[Hat8]

You need to upgrade them at the barracks.

[Voltronjeremy]

Did you make sure to upgrade them yourself? If they're pre-existing units then you need to manually retrain them to the new class.

If the unit can be upgraded, it will have a little yellow arrow on the unit portrait. Click on that unit and a little tap will open above them, and one of the options will allow you to retrain them. This is also the way to upgrade their armor/weapons/etc.

Friendly warning though, upgraded units tend to have higher upkeep, sometimes by a wide margin. When you hover over the 'retrain' button, it will display the stats of the unit it will become, and you can check what the new upkeep will be. Make sure you can afford to field all your new units.

[The Seeker]

thanks for the replies guys, but I surely don't know why that isn't working... it worked when I upgraded them for example, Cohors to Legio - and Limitanei to Comitatensis Spears... Now no upgrade button no nothing :(