Henry the Fowler
When the West Franks deposed Charles the Simple in 922, he remained king in Lotharingia, from where he attempted to reconquer his kingdom in 923. He was captured and imprisoned by Heribert II of Vermandois until his death in 929. In 923, king Henry the Fowler of East Francia used this opportunity and invaded Lotharingia (including Alsace). In 925, Lotharingians under Gilbert elected Henry the Fowler to be their king. In 930, Gilbert's loyalty was rewarded and he received the prestigious hand of Henry's daughter Gerberga in marriage.