It appears that you can create 4 simultaneous missions.

I think you have to win the mission to gain progress towards that dog tag.

From the wording, it appears that once everyone completes the mission then it ends. This would make the missions go fast.



I would like to run a test with someone where we create a 1 attempt, 2 person mission, to see that it awards the mission quickly and allows the creation of a new one.