The major new use for S/L units in this campaign was to reflect light off the cloudbase to provide 'artificial moonlight' or 'movement light' (also known as 'Monty's moonlight' after 21st Army Group's commander, General Sir Bernard Montgomery) in support of night operations. 344th, 356th and 474th Independent S/L Batteries pioneered this technique using their mobile 90 cm searchlights. On 9 July, 474 Bty sent six S/L detachments to provide artificial moonlight in the forward area for 43rd (Wessex) Division, which was moving up to its starting positions for Operation Jupiter. Three days later, the battery repeated the process for 53rd (Welsh) Division.