Suppose you play Harvest in spring. In summer the card 'redeployment' allows you to take it back. Now you play the order card Mobilize. Do you get the supremacy bonus?
My reasoning: No. The rules say: "When resolving an Order card, if it is the current player’s highest numbered card used this year, then he may use the Supremacy Bonus ability on the card in addition to the primary ability." and you have used a card with a higher number (it just isn't on the table anymore).