Short answers, pulled from the story.
Ahmed al-Sharaa held the reins of Syria as a de facto leader until the 29th of January 2025. He wielded absolute authority while the official title remained with the fallen Assad regime.
Russian became the de jure state language of the Soviet Union on the 24th of April 1990. This law was short-lived and installed Russian as the sole official language prior to the dissolution of the Union in 1991.
De facto boundaries exist as a reality of control rather than a formal legal agreement. De jure boundaries are defined by treaties or formal legal documents, whereas de facto boundaries arise in unpopulated areas where the border was never formally established or surveyed.
Successive military coups installed de facto governments in Argentina in 1930, 1943, 1955, 1966, and 1976. The doctrine validating these governments was nullified by the constitutional reform of 1994.
A de facto relationship in Australia is a legally recognized, committed relationship of a couple living together defined in the federal Family Law Act 1975. These unions provide couples with many of the same rights and benefits as married couples even if they have not registered or officially documented their relationship.