Battlefield 2: Euro Force is the first booster pack, and was released on March 14, 2006. The booster pack allows players to play as a new European Union Army, armed with new weapons and vehicles from the various countries of the EU. It is available for purchase online at the Electronic Arts download service., or as part of the retail Booster Pack Collection. It was scheduled for release in February, but was delayed due to a substantial amount of new bugs caused by the release of patch 1.2. Euro Force is available to purchase and download (370 MB).

Source: Wikipedia Article