base of operations; foothold
Refers to a secure location from which activities are conducted, often used for military, business, or organizational bases.
The company established a new base of operations overseas.
The guerrilla unit built a base deep in the mountains.
根拠地 is a slightly older or more literary term for a home base of operations, while 拠点 is the standard modern word used in business and logistics.
Compound of 根拠 (basis, grounds) and 地 (land, place). The exact historical derivation is uncertain, but the word has been used since the early 20th century to denote a secure operational base.