Between World War I, the Russian Revolution, and the collapse of the Ottoman Empire, many historic European stud farms were lost; in Poland, the Antoniny and Slawuta Studs were wiped out except for five mares. Notable among the survivors was the Janów Podlaski Stud. The Russian Revolution, combined with the effects of World War I, destroyed most of the breeding programs in Russia, but by 1921, the Soviet government reestablished an Arabian program, the Tersk Stud, on the site of the former Stroganov estate, which included Polish bloodstock as well as some importations from the Crabbet Stud in England. The programs that survived the war re-established their breeding operations and some added to their studs with new imports of desert-bred Arabian horses from the Middle East. Not all European studs recovered. The Weil stud of Germany, founded by King Wilhelm I, went into considerable decline; by the time the Weil herd was transferred to the Marbach State Stud in 1932, only 17 purebred Arabians remained.