However, in early September 1795 the General of Division Jean-Baptiste Jourdan's Army of Sambre-et-Meuse crossed the lower Rhine River and advanced south to the Main River. For the first time Mainz was besieged on the east side of the river, but this state of affairs did not last long. After the Battle of Höchst, Clerfayt forced Jourdan's army to retire to the west bank of the Rhine.
In early September 1795, General Jean-Baptiste Jourdan's Army of Sambre-et-Meuse crossed the lower Rhine River and advanced south to the Main River, laying siege to Mainz from its eastern side for the first time. However, this situation was short-lived due to the Battle of Höchst, which led Clerfayt to force Jourdan's army to retreat to the western bank of the Rhine.