An explanation of the phases:
You can play non combat cards medic, behind cover, and air raid
Then draw a card from the armory deck by clicking on it.
If you already have 5 cards you'll have to discard one or pass
Simply draw a card from the patrol deck by clicking on it.
Click on cards in your hand then click on a patrol card you wish to assault if the patrol card has AT or AAI in the name you have to have AT in your cards.
Hope that clears that up.