From 1790 to 1794, the French Revolution became increasingly radical. In 1792 the revolutionary government declared war on several European nations, including Great Britain, starting the War of the First Coalition. A wave of bloody massacres spread through Paris and other cities late that summer, leaving more than one thousand people dead. On September 21, 1792, France declared itself a republic, and the deposed King Louis XVI was guillotined on January 21, 1793. Then followed a period labeled by some historians as the "Reign of Terror", between the summer of 1793 and the end of July 1794, during which 16,594 official death sentences were carried out against those accused of being enemies of the revolution. Among the executed were persons who had aided the American rebels during the Revolutionary War, such as the navy commander Comte D'Estaing. Lafayette, who was appointed commander-in-chief of the National Guard following the storming of the Bastille, fled France and ended up in captivity in Austria, while Thomas Paine, in France to support the revolutionaries, was imprisoned in Paris.