noun, noun or participle which takes 'suru'
occupation and defense
Rare term for occupying and defending territory, typically in a military or strategic context. Modern usage is extremely limited; the concept is more commonly expressed with phrases like 占領・防衛.
この地域の占守は、戦略上極めて重要だった。
The occupation and defense of this area was strategically crucial.
Compound of 占 (occupy) and 守 (defend). The exact historical derivation is uncertain; it appears to be a coined term for military occupation and defense.