How did the Ottoman Empire survive in a weakened state until the First World War?
Short answerBritain and France often helped preserve it as a strategic check on Russia.
NotesLongevity did not necessarily prove internal strength. Britain and France repeatedly found a weakened Ottoman Empire more useful than the vacuum its collapse would create. Ottoman territory functioned as a strategic buffer against Russian expansion toward the Mediterranean and the routes beyond it. External balancing therefore helped keep the empire in existence even when its own institutions were badly strained.