Completion of the Chemins de fer de l'Est line extension

July 12, 1864, saw the opening of a key extension of the Chemins de fer de l'Est, linking Paris more directly to Strasbourg via improved gradients and new bridges over the Marne River. Engineer Eugène Flachat oversaw construction, employing advanced wrought-iron truss bridges that addressed flooding risks. This development was crucial during the lead-up to the Franco-Prussian War, facilitating troop movements and trade. The line featured early adoption of 4-4-0 locomotives suited for mixed passenger and freight duties. Its lasting impact includes forming the backbone of modern SNCF routes, with preserved sections highlighting 19th-century engineering prowess for modelers and historians alike.