isImpassable is an attribute related to a territory that specifies that units may not pass through or over it. 

See Neutrals Are Impassable

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.