Seine River Steamers early vessels meant that positive traction by pulling on a chain against a deadman or anchor was much more effective. In the 1830s river travel was considered dangerous, so much so that insurers would put a 25 percent premium on cargoes and vessels travelling the route. The Seine is divided into three sections, the lower or Oise section, middle or Paris Section, and upper or Marne section. Ships enter the river at Le Havre through a bad tidal bore. (Victor Hugo's favourite daughter was killed while travelling in a small boat across the bore.) Oceangoing ships can travel to Rouen,
6th Airborne Division advance to the River Seine heavy anti-aircraft artillery regiment used in a field artillery role. In the operation the 6th Airborne Division together with the 7th Armoured Division, the 49th (West Riding) Infantry Division and the 51st (Highland) Infantry Division, formed the I Corps, attached to the First Canadian Army. When issuing his orders, Lieutenant General John Crocker, the Corps commander, aware that the 6th Airborne had almost no artillery, vehicles or engineer equipment, did not expect them to advance quickly. To reach the River Seine the division would have to cross three main rivers, along only two main lines of advance. One route was