What does this medal mean?

It’s a hivebuster medal. I need to “escape 15 hives with each Lahni, Keegan and Mac”. Does it mean that I should have a squad consisting of those 3 characters, or that I have to escape 15 hives with Keegan, 15 hives with Mac and the same with Lahni? And why does it show up 2/3? It’s so confusing.

you have to complete 15 with each character… .so 15 w/Mac = 1/3, then 15 w/ Lahni = 2/3 then another 15 w/ Keegan = 3/3 and will complete the medal

Edit: Not necessarily in that order