To overcome and set fire to a rebel’s stronghold
摧烧贼寨
a stronghold of feudalism
封建堡垒
capture an enemy stronghold
攻克敌军据点
to guard a natural stronghold
据守天险
production stronghold
生产据点
bastion(esp. as stronghold of conservative ideas@etc.)
土圈子
【字面意义】 small mountain stronghold
小山头
【字面意义】 small mountain stronghold
大本营