Which commendations do you need to get achilles

Games Halo 5: Guardians
#1

Which commendation do you need to complete to get achilles armor

#2

Company Kill commendations. They aren’t the ones you see in game. If you go to a company’s page scroll down and you will see the company kill commendations. Once you complete all level 3 kill commendations you get the armor. After completing level 5 you get the helmet.