Assertion: tank | /r/HasProperty | performed in traditional role
Facets:
value: in close cooperation with infantry units
type: OTHER
value: during the invasion of poland
type: TEMPORAL
Source sentences:
text: During the Invasion of Poland, tanks performed in a more traditional role in close cooperation with infantry units, but in the Battle of France deep independent armoured penetrations were executed by the Germans, a technique later called blitzkrieg.