The Crusaders was a relatively minor team of super heroes hailing from the United Kingdom during World War 2. Essentially, the team was created as a plot by the Nazis to eliminate the heroic Invaders, who were giving them way too much grief at the time.

Using one of their agents, 'Alfie', the Nazi regime summoned forth various British heroes (and the Spirit of '76, who was in England at the time), and convinced them to form a team of Nazi-busters: the Crusaders! Their first target, of course, turned out to be the Invaders.

When that team was attending the cristening of a new battleship, they were attacked by our heroes, who were told by Alfie that they were really Nazi agents, and were about to show their true colors. The Invaders eventually set the Crusaders straight, however, and the fierce battle ended.

Furthermore, they prevented Alfie's attempted assassination of then-King George the Sixth. Soon afterward, after realizing that they were used as Nazi dupes, the Crusaders disbanded, though most of them continued on as heroes in their own right. Here, for your gaming amusement, are the Crusaders:

Of course, just because the Crusaders disbanded after only one mission, that doesn't mean they can't regroup and band together against any new threats to the Realm (or to the rest of the world, either). If it suits your game better, feel free to make the Crusaders fight again!