A militia building

Please add another building to the game that would let players convert their civilians to some sort of militia units for defense.

How the idea came to me: I was getting rushed and had no means to build troops so I started converting everyone to woodcutters and hunters (2 at a time) to fend off the attack.

How I see it working: A house like building, because you can convert everyone to villagers at the same time by using a house, as opposed to 2 or 3 at a time with production buildings.

The militia would still be civilians, so they would be restricted to moving only inside your borders.

The models for Raven mercenaries could be used, maybe without a shield.

They should be somewhere between a civilian and a military unit in stats.

I don't know the following:

If it should cost a building slot or not (it could be just like the tower).

If an upgraded tower could have this function instead.

If the militia should be able to gather something like a bit of food, maybe as much as they eat per tick.

How it should look (maybe just a random building, a weapon rack or even a regular house with a weapon rack on it). Maybe it could cost iron.

Basically I can't say anything about balance, but I think this kind of implementation would be something nice to have and would help prevent 2v1 all in rushes in team games.

What do you guys think?