1914. The war puts an end to the party. In the aftermath of the most deadly conflict in contemporary history, business proved difficult. Fortunes weakened. The world changed. Close to the tzar, a member of the Parisian Russian aristocratic diaspora, Nicolas Raffalovich, the Russian investor, for whom Niermans carried out in 1905 the development of the spa resort of Martigny-les-Bains in the Vosges, was unable to honor the amount of work after the Russian revolution. In compensation for his debt, he offered the Domaine de Montlaur acquired without even knowing it in 1919 - he never lived there - from the last of the Mas who was forced to part with it because of gambling debts contracted at the Casino de Monte-Carlo.
Without any alternative, the deal was concluded in 1921: through gambling, Edouard Niermans became the owner of the Domaine de Montlaur, which then included more than a hundred hectares of vines and cereals. "It's better than nothing," judged Louise Marie-Héloïse, his wife.