sentences:  During March 1757 Fort William Henry came under siege for four days by French forces.Lacking sufficient logistical and artillery support, and hampered further by a blinding snowstorm on 21 March, French forces were unable to take the fort and the siege was called off.Although the French failed to take the fort itself, their forces did destroy three hundred bateaux and several lightly armed vessels beached on the shore, a saw-mill and numerous outbuildings.