Assault and battery are both criminal and civil.  Assault is placing one in reasonable apprehension of an immediate battery.  Battery is the harmful or offensive touching of another without consent or privilege.For the criminal case, you should contact the police and file charges for assault and battery against all three individuals.  The district attorney's office will determine whether or not there is sufficient evidence to pursue a criminal case.  A conviction in a criminal case requires proof beyond a reasonable doubt.For the civil case (lawsuit), when you complete your medical treatment and are released by the doctor, obtain your medical bills and medical reports.  The medical reports will document the nature and extent of your injuries and will be used to determine the amount of compensation you receive for pain and suffering.  Compensation for pain and suffering is an amount in addition to the medical bills.  Your claim would include the medical bills, medical reports, and documentation of wage loss.  Compensation for the medical bills and wage loss is straight reimbursement. You will need to file your lawsuit for assault and battery prior to the expiration of the applicable statute of limitations or you will lose your rights forever in the matter.  Your lawsuit should name all three individuals as defendants.The standard of proof in a civl case is a preponderance of the evidence which means more likely than not.  This is a lesser standard of proof than in the criminal case which as mentioned requires proof beyond a reasonable doubt.