From the announcement:
On June 15th, we are throwing open our doors for the premier A Call to Arms: Star Fleet tournament - Star Fleet's Finest!
This is where the elite admirals get together and demonstrate their tactical prowess (or not, as the case may be), and is always an easy, fun event with plenty of prizes, good games, and great company!
If you use the coupon code FLEET when purchasing your ticket, you will not be charged any postage!