Here's the idea:
War of trenches map, conquest.
All random people riflemen with bayonets.
A few chosen men officers to blow whistles to sound the charge.
Each side has a turn to go over the top, once killed, player must stand ready for the next wave in their trench.
That's the general idea of it, opinions or stuff to add? I feel it'll be a great way to get more people to play again.