Assertion: fortress's line | /r/HasProperty | approximately 5 km
Facets:
Source sentences:
text: Outpost and Support Point line: Approximately 5 km (3 mi) behind the border, a line of anti-tank blockhouses that were intended to provide resistance to armoured assault, sufficient to delay the enemy so as to allow the crews of the C.O.R.F. ouvrages to be ready at their battle stations.