==References====External links==*NRL Railgun Demonstration Video US Naval Research Laboratory, July 2010* Jane's Defence Weekly, 20 July 2006*Electromagnetic Railgun Popular Science Article*Video of Navy railgun test firing, Navy Electromagnetic Launch Facility, Test Shot #1, 2 October 2006.
V njegovem času je postala personalna unija Poljska-Litva ena vodilnih držav vzhodne Evrope.