Assertion: chloropicrin's effect | /r/HasProperty | coupled with threat
Facets:
value: to the salient's flanks
type: TRANSITIVE-OBJECT
Source sentences:
text: When Germany launched Operation Michael on 21 March 1918, they saturated the Flesquières salient with mustard gas instead of attacking it directly, believing that the harassing effect of the gas, coupled with threats to the salient's flanks, would make the British position untenable.[citation needed]