Both Brigades of the 9th Division were heavily engaged at Quatre Bras on the 16th. Gauthier’s 1st brigade supported Jamin’s 2nd which had formed up with the entire 5th division just after two o’clock for Ney’s first attempt at securing the crossroads. With the arrival of Jerome’s 6th division on the French left, Foy now formed the centre of Ney’s line. Here Both brigades were to spend the day involved in the struggle for Gemioncourt.
At Waterloo the 9th division was stationed between Jerome’s 6th division and Bachelu’s 5th on the French left flank. Tissot’s 1st brigade (Gauthier being wounded at Quatre Bras) was committed to Jerome’s fruitless attempts at gaining control of Hougoumont at around 1.15pm . The brigade was to spend the rest of the day embroiled in the continual fighting based in and around the great orchard, before finally being pushed back by concentrated Allied attacks at 7.00-7.30pm.