Total War: ROME REMASTERED

Total War: ROME REMASTERED

RTR: Imperium Surrectum 0.6.7
White symbols on units (noose and Hand), what are they? Cant retrain them
Hi, so loving the mod so far, new to it.
For my first Campaign I chose Athens, and its going well, but after a few turns I noticed that every town/city other than my Capital can only recruit units with the two white symbols on them. What do they mean? Can that city get rid of them in terms of recruitment? Only thing Ive noticed is that they cant be retrained, only for weapon upgrades (which cost 1 gold btw :P).
A decent explanation would be most welcome.
Hope someone can enlighten me, cheers.