أوتو الأول
On Henry's death in 936, Gilbert rebelled and tried to swap Lotharingian allegiance to the West Franks, since their king Rudolph was weak and would interfere less in local affairs. In 939, Henry's son and successor, Otto I, Holy Roman Emperor, invaded Lotharingia, and at the Battle of Andernach defeated Gilbert who drowned trying to flee across the Rhine.