France declared war on Austria on 20 April 1792. The increasing radicalization of the French Revolution (including the execution of the king on 21 January 1793), as well as the French occupation of the Low Countries, brought Britain, the Dutch Republic, and Spain into the war, which became known as the War of the First Coalition. This first war with France, which lasted until 1797, proved unsuccessful for Austria. After some brief successes against the utterly disorganized French armies in early 1792, the tide turned, and the French overran the Austrian Netherlands in the last months of 1792. By the Battle of Valmy in September it was evident to Austria and their Prussian allies that victory against France would elude them, and Austria suffered a further defeat in November at Jemappes, losing the Austrian Netherlands (Belgium). While the Austrians were so occupied, their erstwhile Prussian allies stabbed them in the back with the 1793 Second Partition of Poland, from which Austria was entirely excluded. This led to the dismissal of Francis's chief minister, Philipp von Cobenzl, and his replacement with Franz Maria Thugut in March 1793.