From the announcement:
Combat Patrol & Sally 4th are giving away vehicle stat cards to gamers who write a report of there combat patrol game.
Post an after action battle report on the Internet (This could be on your hobby blog / TMP/ Lead Adventurers Forum etc), email us a link to the report and a one line description together with your name and address and we will send you three free Vehicle Stat Cards to use in your Combat Patrol games. Current promo cards are of US Vehicles, we will swap the nationality arround once a quarter.
Email links to firstname.lastname@example.org