In 929, King Henry I of Germany (919–36) launched an exceptionally successful offensive against the Slav polities along the length of his eastern frontier. This campaign, which is recorded in contemporary written accounts, has long been known to historians, and its importance in the political history of the German kingdom is undisputed. However, to date, there is no book‐length or article‐length study devoted to Henry's military successes in 929. This article fills that striking lacuna by drawing on the vast body of information provided through excavations, which sheds considerable new light on the scale and sophistication of Henry I's undertaking.
