Heinrich (Henry), Prince of Prussia (August 14, 1862, Potsdam – April 20, 1929, Hemmelmark [now belonging to Barkelsby]), German grand admiral. Heinrich was born in 1862 the second son of the future Kaiser Friedrich III. At the age of 15 he became the only Prussian prince to embark upon a military career in the Imperial Navy. After completing naval college Heinrich was promoted lieutenant commander in 1882. He was given his first command, a torpedo boat, in 1886. This was followed by a series sea-goi…

Wilhelm, German Crown Prince (May 6, 1882, Potsdam – July 20, 1951, Hechingen), crown prince of the German Reich and of Prussia. Wilhelm was born in 1882 as the first son of the later Kaiser Wilhelm II. He began his military career at the age of 14, interrupting it for a time to study political science in Bonn. In fall 1911 he was named commander of the First Life Guards Hussars Regiment in Danzig (Gdańsk). Though hardly qualified, he assumed command of the Fifth Army when war broke out in August 19…