Assertion: bridgehead | /r/HasProperty | the port of cherbourg
Facets:
Source sentences:
text: From 7 to 8 April Montgomery held Operation Thunderclap, a planning exercise in which the intention of the operation was given as simultaneous attacks north of the Carentan Estuary and between the estuary and the Orne, to capture a bridgehead that included airfield sites and the port of Cherbourg.