That is indeed what I am doing; and I am moreover saying that such is the generally accepted definition too. My point is that there is a difference between de facto control and political legitimacy. Example: the West acknowledged both as fact and as legitimate (but not democratic) the rule by Stalin's government over Belarus. But Soviet rule over the
Baltic Republics was acknowledged as a factual reality, but not recognised as legitimate, because that was the result of the Soviet Union dissolving previous representative governments and imposing its own authority in 1940.
The application of the Stimson Doctrine by the Welles Declaration where a significant segment of the international community refused to grant formal approval for the Soviet conquest, the resistance by the Baltic people to the Soviet regime, and the uninterrupted functioning of rudimentary state organs in exile support the legal position that sovereign title never passed to the Soviet Union, which implied that occupation sui generis (Annexionsbesetzung or "annexation occupation") lasted until re-independence in 1991. Thus the Baltic states continued to exist as subjects of international law.
...
The legal principle, ex injuria jus non oritur (law cannot arise from unjust acts), differs from the competing principle of ex factis jus oritur (the facts determine the law). On one hand, legal recognition of Baltic incorporation on the part of other sovereign nations outside the Soviet bloc was largely withheld based on the fundamental legal principle of ex injuria jus non oritur, since the annexation of the Baltic states was held to be illegal.