From the announcement:
Use the code GERMANWWII in the coupon code box at checkout and receive 40% off the packs on orders over $50.
Code is good until July 20th so hurry and order.
Offer only good with coupon code. Not good with other offers. Must use coupon code to get special price and orders must be over $50. Not good with prior orders. Offer can end without notice. Only good on German WWII packs.