"History of Friedrich II of Prussia — Volume 21" by Thomas Carlyle is part of a six-volume biography published between 1858 and 1865. This monumental work chronicles the life of Frederick the Great, Prussian king and military commander. Carlyle devoted thirteen years to researching and writing this epic history, traveling twice to Germany to study battlefields and source materials. The result was celebrated as a masterwork of literary genius—praised for its vivid character portraits, battle narratives, and moral judgment, blending historical scholarship with Carlyle's distinctive wit and philosophical insight. (This is an automatically generated summary.)