The American army arrived in France in June 1917 and established bases in several ports along the western coast. They were welcomed by the French people in Saint-Nazaire, where the port underwent improvements to accommodate the American forces. Between 1917-1919, around 198,000 troops and 4,400 tons of supplies arrived in Saint-Nazaire. The 30,000 American soldiers stationed there boosted the local economy. The Americans helped modernize infrastructure and also supported efforts to fight diseases like tuberculosis. After the 1918 armistice, tensions arose as the French reproached the Americans for their fast-paced modern ways. The American forces eventually departed in 1919, with the mayor giving a farewell speech praising their contribution.