The Grand Est Pilot Region, in partnership with the departments of Ardennes, Dawn, Marne, Haute-Marne, Meurthe-et-Moselle, Meuse and Vosges, the largest fibre optic concession launched on this scale in France and entrusted to LOSANGE. It aims to connect nearly 3,600 municipalities, i.e. approximately 961,761 catches (in firm slices) by 2023, i.e. approximately 468,646 catches in the territory of Champagne-Ardenne and approximately 493 115 catches in Lorraine (outside the Moselle department), in complementarity with the investments of private operators in denser urban areas. This ERDF aid application concerns: — Design studies relating to the deployments of the firm tranche of the LOSANGE project, carried out between 4 August 2017 and April 2018; — The implementation studies on the deployments of the firm tranche of the LOSANGE project, carried out from April 2018 to February 2023.