The Cuba situation was perhaps a little more complicated because the US implemented a naval blockade of the island (disingenuously labelled a "quarantine"), whi

The Cuba situation was perhaps a little more complicated because the US implemented a naval blockade of the island (disingenuously labelled a "quarantine"), which, to many, didn't look like an act of war. Therefore if the Soviets had tried to exercise their sovereign right to dock their ships at a Cuban port, and the US navy had opened fire, then there might have been uncertainty about whether the Soviet breaching of the blockade was an act of aggression that the US was merely defending itself against. No such ambiguity exists in Russia's recent invasion of Ukraine, despite their label of "special military operation". Their covert invasion (and effective military occupation) of Crimea and the separatist regions are better examples of ambiguous acts of war, though.