At this time the Fort Sill registration website is being transitioned. We apologize for the inconvenience. This transition can take up to 120 days. The pre-registration process will still be possible by contacting your soldier’s unit. You will need to complete the Fort Sill Form 118a. For more information please visit the Fort Sill Visitor Control Center (VCC) website: http://sill-www.army.mil/vcc/