Source:
French Aircraft of the First World War
8th April 1917, PS 125 and PS 126 were formed.
14th April 1917 PS 127 formed.
15th May 1917 PS 128 formed.
The PS escadrilles of GB 3 were based at Plessier Saint-Just in April. Moved to Pierrefonds. From here bombed targets in the Some and Aisne Sectors.
Attacks on:
Essigny-le-Petit
Nouvion-Catillon aerodrome
Railway stations in Somme valley
Lanquetaille camp
Cambrai railwat station
Pouilly sur Serre area
Enemy fighters caused heavy casulaties.
By Sept 1917 aircraft withdrawn from front line service.
PS 128 to Sopwith 1 1/2 Strutters in June
PS 126 and 127 to Breguet 12 B2s in Nov
PS 125 to Voisin 8s on 24 Jan 1918
150 units produced. Overall considered a costly failure due to using 1915 technology in a 1917 battlfield.