How Soviet bastion doctrine changed over the Cold War

Distractions could make several places appear vulnerable to Soviet attack at once. That use of deception cautions against reducing Soviet strategy to a single defensive purpose. Bastion terminology also changed over time, from sea areas the navy expected to dominate toward spaces from which opposing forces would be excluded. Similar language across decades can therefore conceal a change in operational emphasis. The later submarine-protection mission needs to be understood in its own period.