Abstract: A weapons-mounted marksmanship training system comprises a system adapted to be a replacement device for the sighting system of a conventional weapon. The training system includes a high resolution display controlled by an embedded CPU and graphics processor, with video training images maintained in a mass storage unit. A motion tracking unit is also provided to detect motion of the weapon on which the training system is mounted. Personnel being trained in the use of the weapon are able to select a training scenario, which is then realistically portrayed in the image display, without the need for any special environment or external devices.