 Upon her husband's reactivation during World War I and his rise to the highest military functions, Gertrud von Hindenburg took over mainly charitable works, such as personally caring for the war wounded and founding the Gertrud von Hindenburg Foundation for moral strengthening of German youth.Following the war, Gertrud lived with her husband again in Hanover, where she died in 1921 from cancer.She was initially buried in Hanover until 1927, when, at her husband's request, she was exhumed and reburied at the East Prussian ancestral home of the von Hindenburgs -- the manor Neudeck in Rosenberg -- which had at that time been returned to the family.