Maybe on earth...
...maybe in the future
The answer to this is obvious IMO, but I'm going to ask the question anyway (wouldn't be the first time I missed something).
On page 7 of the rule book, discussing Command Cards:
"Each command card also has an activation value. When it is a player's turn to resolve his chosen command card, he must activate a number of his disks equal to the command card's activation value."
My question being, what if you play a card with a command value of 3, but only have 1 or 2 disks remaining that can be activated?
The 'obvious' answer being, in that case, I can only activate two disks (must activate my two remaining disks). So I assume the use of the word 'must' in the wording is so one doesn't hold units back when you do have enough inactivated disks compared to the command points available?
Exactly. If you only have 2 units you don't have to use the third activation, not even to reinforce disks. If you have 3 or more you must use all the activations.