The siege of Bergen op Zoom (8 March 1814), took place during the War of the Sixth Coalition between a British force led by Thomas Graham, 1st Baron Lynedoch and a French garrison under Guilin Laurent Bizanet and Jean-Jacques Ambert. The initial British assault force seized part of the defences, but a well-managed French counterattack compelled much of the assault force to surrender. Bergen op Zoom is a port in the Netherlands about 70 kilometres (43 mi) south of Rotterdam and 40 kilometres (25 mi) north of Antwerp in Belgium.