Star Trek Adventures
Battle of Wolf 359
One of the most destructive battles in Federation history, the Battle of Wolf 359 took place in Earth year 2367 in the Wolf system, roughly eight light years from Earth, between the forces of the United Federation of Planets and the Borg Collective. The Federation lost thirty-nine of the forty starships mobilized for the conflict. Historians regard this as the worst defeat in military annals since the Spanish Armada was sunk.
The development of the heavily armed Defiant-class was a direct result of the battle. Starfleet has been on a war footing ever since. Many people within the Federation, like Captain Hensley, are uncomfortable with this and are trying to steer Starfleet back to its original mission statement of peaceful exploration.