Spartan company level

Does anyone know how to level up a spartan company to get the achilies armour. Sorry if I spelt it wrong.

You need to achieve Level 3 in all Kill commendations for the Achilles armour set.
You need to achieve Level 5 in all Kill commendations for the Achilles helmet.

It takes a long time to get to level three and five, you have to get a lot of types of kills in order to level up.

how do i check my level

never mind i know