The collapse of the Pact heightened tensions in the island, leading to another rebellion in 1895, which greatly expanded in 1896–1897 to cover most of the island. Six Great Powers (Austria-Hungary, France, the German Empire, the Kingdom of Italy, the Russian Empire, and the United Kingdom) sent warships to Crete in February 1897, and their naval forces combined to form an "International Squadron" charged with intervening to bring fighting on Crete to a halt. In Greece, nationalist secret societies and a fervently irredentist public opinion forced the Greek government to send military forces to the island. Although the International Squadron quickly halted their activities, the presence of Greek forces on Crete provoked a war with the Ottoman Empire. Although most of Crete came under the control of Cretan insurgent and Greek forces, the unprepared Greek Army was crushed by the Ottomans, who occupied Thessaly. The war was ended by the intervention of the Great Powers (the United Kingdom, France, Italy and Russia), who forced the Greek contingent to withdraw from Crete and the Ottoman Army to stop its advance. In the Treaty of Constantinople the Ottoman Government promised to implement the provisions of the Halepa Pact.