 In June, Pepin finally joined with Lothair in Auxerre.On 25 June 841, Lothair and Pepin initiated the ensuing Battle of Fontenay and had the upper hand until the arrival of Guerin and his army of Provençals turned the tide in favour of Charles.Charles sent Guerin to expel Bernard of Septimania from Toulouse in 842 and then against Gothia in 843.