Following the war, Beatrice was one of several members of the royal family who became patrons of The Ypres League, a society founded for veterans of the Ypres Salient and bereaved relatives of those killed in fighting in the Salient. She was herself a bereaved mother, as her son, Prince Maurice of Battenberg, had been killed in action during the First Battle of Ypres. Rare public appearances after his death included commemorations, including laying wreaths at the Cenotaph in 1930 and 1935 to mark the 10th and 15th anniversaries of the founding of the League.