stronghold; base; headquarters
Refers to a main base of operations, whether a physical fortress, a military stronghold, or an organization's headquarters.
The enemy forces holed up in their mountain stronghold.
The company's headquarters is in Tokyo.
The company is based in Osaka.
The team plans to move its base to Tokyo next year.
The company has established its base in Silicon Valley.
基地 typically names a physical, often military or scientific, installation, while 本拠 is broader and can apply to an organization's central base without implying a built facility.
stronghold; base; headquarters
Compound of 本 (main) and 拠 (base, foothold). The exact historical derivation is uncertain, but the meaning follows naturally from the kanji components.