defending a town

[AjojMajoj]

Do I get it right?

UG can defend a town boundary (and get the "barricades" claim) only if it is wholly within the terrain.
UG defending a town is affected or badly affected in combat.
Enemy fighting a UG defending a town is affected or badly affected in combat.

Which means that an infantry SuG defending a town gets +4 claim in charge combat against a loose infantry TuG.