Foaled in 1930, Polarstern was used with very good effect on the black Trakehner herd based at the Gurdzen farm and contributed the bone and substance which was required at that period in the breed's history, while still passing on breed type and quality. Sixteen stallions which were standing at Trakehnen just before its destruction were all evacuated in the autumn of 1944 and headed for the west. All were lost or disappeared in the confusion at the end of the war. Only Polarstern was found in the early 1950's and as such, played a very important roll in the revival of horse breeding in Poland.