I've seen (and upvoted) a proposal to allow joint fleet actions by allied empires, but what about invasions? I was recently playing a game where there was a 5-way fight over a vital system. My ally got there first and launched a ground invasion, but wasn't making much progress. I got there with two massive fleets the next turn, but couldn't contribute beyond chasing off counter-attacks. It was frustrating.


It would be great if there was some way to have joint invasions, or the option to lend my fleet's manpower to my ally's invasion forces or something.