​when a firm refuses to allow union employees to enter the workplace the action is known as a
Strike action Another counter to a strike is a lockout, the form of work stoppage in which an employer refuses to allow employees to work. Two of the three employers involved in the Caravan park grocery workers strike of 2003-2004 locked out their employees in response to a strike against the third member of the employer bargaining group. Lockouts are, with certain exceptions, lawful under United States labor law.