Disorderly conduct is a broad category crime that can include many types of conduct. Often it is a situation where a fight occurred, but police can’t really tell who started it. The definition by law states you (a) engage in fighting or in tumultuous conduct; (b)make unreasonable noise and continues to do so after being asked to stop; or (c)disrupt a lawful assembly of persons. Any violation that fits into that might land you charged with a disorderly conduct charge.
Unlike a battery charge, the fighting category does not require proof that you were the aggressor. Just being involved in a fight and not walking away from is enough to result in charges. Sometimes you may be the victim of a fight and you were defending yourself, but the police were unable to determine that, and you get charged with disorderly conduct. Self-defense may be a good argument to make to avoid a conviction.