As well as the North Sea region, many other regions of Germany developed numerous herd book organizations for black-and-white and red-and-white cattle. East Prussia was especially well-known for its black-and-white breeding. The first herd book organization in East Prussia was founded in 1882. With 6,000 members and 350,000 registered cows, it was the largest cattle breeding organization within Europe and at the forefront of the development of modern breeding until its breakup in 1944 during the troubled years of the war.