I think we have to talk about a Teamspeak server. Either one TS who is big enough for ~ 180 people or two TS for ~ 90 people. Maybe Battleground Eu???
Furthermore we have to talk about the command chain.
My proposal for France italy and Germany:
We split all three nations in three squads: cavalry, infaterie and archers. Then we have in each squad one captain who is in contact with the "high command" (per whisperlist)
The high command consist of one archer, one cav an one inf (in an extra channel) The high command is responsible for the tactic and get killed if we lost.
the high command give the orders to the captains and the captains convey the orders to the rest of the squad.
For this command chain we need three people's for the high command in an extra channel and three captains in each squad.
What do you think about that?
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