The Revolution initiated a series of conflicts that began in 1792 and ended only with Napoleon's defeat at Waterloo in 1815. In its early stages, this seemed unlikely; the 1791 Constitution specifically disavowed "war for the purpose of conquest", and although traditional tensions between France and Austria re-emerged in the 1780s, Emperor Joseph cautiously welcomed the reforms. Austria was at war with the Ottomans, as were the Russians, while both were negotiating with Prussia over partitioning Poland. Most importantly, Britain preferred peace, and as Emperor Leopold stated after the Declaration of Pillnitz, "without England, there is no case".