Assertion: gunpowder's use | /r/MadeOf | earth
Facets:
value: in redoubts
type: LOCATION
value: in breastworks
type: LOCATION
Source sentences:
text: Instead of majestic towers and merlons, the walls of new fortresses were thick, angled, and sloped, while towers became low and stout; increasing use was also made of earth and brick in breastworks and redoubts.