A powerful mercenary group should take the place of the fighter's guild, since since something like a stable guild of warriors wouldn't really make sense in an atmosphere of civil war. Your choices within the quest line could determine whether the mercenary force joins one political faction or the other (or neither).
Perhaps you could recruitkey members via quests, but I wouldn't want to amass my own army via recruiting bandits, etc. By definition, mercenaries fight for money, and the only key to gathering your own army would be to amass a crap ton of cash. That just sounds tedious. Better to have the force already established as a faction.
I think you should have the choice if you want to join an army or not
and there should be many different around skyrim, they doesnt always have to be mercanary armys.
it also could be groups,bands,gangs wahtever you want to call it
there could be different reasons for people to join them. Maybe they have no home, or just want to fight, or money, or feeling not save in the city, or they like you.
Dont you think it would be more atmospharic instead of just one army per city. Dialog like: do you want to join us ? yes! Ok.
After some Quest, fighting rats and stuff... Now you are the leader. OK. Bye...
Each army/Group/Gang should be outside of citys (gangs could be, but if they grow they have no other choice to leave, because the people dont want them to be there).
All of them have their own area. Maybe some Groups want to spread their teretorry and attack other groups.
There could be a group (lets call them "Band of the Hawks), which want to spread their teretory. So they fight against another Group and win.Their Teretory became bigger. Now their name spreads around little bandits coming from their own to join the band of the hawks, because they can give them home, or money. Not just people who fight could join, also people who are reparing stuff, or women who are paying in a different way i dont know^^ But now the band of the hawks became stronger and they spreading their teretory. This group which is already an army took notice of that and dont want the hawks to continiue spreading, so they fight them. They loose.
Now they are the big ones. Maybe you (the character) happened to be there and watch all this. Mayybe you helped the band of the hawks to win, Because you helped them you can join them. Now you are big enough to help Kingomds. And they pay you for supporting them in war. After the war, you get you money. But the troups are exausted and need to rest a little bit.
Small Groups, or other big ones took notice of that! Now they are attacking you.
The Hawks fall apart.
Maybe you and your new gained friends want to take revenge, or just want to start all over... with your rules. Its your decision then
wow i think this goes to deep^^
But this is an example how groups could be formed, raise and fall