In addition to the management of an international chain of department stores, Louis was forced to assume an additional burden when a brother lost a small fortune gambling. With his father too infirm to deal with the situation, it once again fell to the oldest son to do his duty and settle the enormous debt. Louis had no choice but to borrow the sum from a very rich relation, something that humiliated him to his core. So, as a matter of honor, he insisted on repaying the loan with 100% interest – over the protests of the lender and everyone else in the family. As a result, the task took Louis several years. These responsibilities and World War I combined to condemn him to what was a frustrating life as a merchant, however successful, until after his father's death and the conclusion of the war.