 Complete the following phrase:  Bournonville marched south to the Imperial City of Strasbourg, giving him a base for an attack on Alsace but before doing so, he awaited the arrival of 20,000 troops under Frederick William. To prevent this, Turenne made a night march that enabled him to surprise the Imperial army and fought them to a standstill at Entzheim on 4 October. As was then accepted practice, Bournonville halted operations until spring but in his a hrefTurenne27s20Winter20CampaignWinter Campaign 16741675a, Turenne inflicted a series of defeats culminating in 