The historical event that resulted in the execution of King Louis XVI was the French Revolution, particularly during its radical phase. After years of discontent over economic hardship, inequality, and political corruption, revolutionaries overthrew the monarchy in 1789. By 1792, Louis XVI was arrested and charged with treason, accused of attempting to undermine the revolution. His trial was marked by intense debate over the direction of the revolution and the role of the monarchy. Ultimately, Louis XVI was found guilty and executed by guillotine on January 21, 1793, significantly symbolizing the break from monarchic governance and the rise of republican ideals in France.