Gang Warfare in The Lost and Damned

Obviously there are several fights throughout the game with other gangs such as the Angels of death. But you can also do side missions that are called "Gang Wars". There are always four different locations that trigger a "Gang War". You don't always fight motorcycle clubs, sometimes you also fight the Albanian Mafia, the Russian Mafia and the Italian Mafia (possibly only the Pegorino Family). To help you are Clay, Terry and Jim and also three non-storyline characters whom, upon death, are replaced. You have to complete 25 "Gang Wars" for it to show on your completion percentage. Completing a "Gang War" gives you money and also raises your fellow biker's toughness, if they manage to stay alive during the actual fights.