In 1800s, several ethnicities living under the Ottoman Empire in the Balkans rebelled and gained their independence with Greece as the first one in 1821. It is estimated that several million Muslims were killed or driven from their lands following these.

From 1821 to WWI and end of the Turkish War of Independence, what was the reaction of the European Great Powers to the policies of the newly independent states? Did they support it, ignore it or were against it?