The Greek War of Independence was fought against which empire?

The Greek War of Independence, also known as the Greek Revolution was a successful war of independence waged by the Greek revolutionaries between 1821 and 1832 against the Ottoman Empire. The Greeks were later assisted by the Russian Empire, Great Britain, the Kingdom of France, and several other European powers, while the Ottomans were aided by their vassals, the eyalets of Egypt, Algeria, and Tripolitania, and the Beylik of Tunis.

Even several decades before the fall of Constantinople to the Ottoman Empire in 1453, most of Greece had come under Ottoman rule. During this time, there were several revolt attempts by Greeks to gain independence from Ottoman control. In 1814, a secret organization called the Filiki Eteria was founded with the aim of liberating Greece. The Filiki Eteria planned to launch revolts in the Peloponnese, the Danubian Principalities, and in Constantinople and its surrounding areas. The first of these revolts began on 6 March 1821 in the Danubian Principalities, but it was soon put down by the Ottomans. The events in the north urged the Greeks in the Peloponnese into action and on 17 March 1821, the Maniots declared war on the Ottomans. This declaration was the start of a spring of revolutionary actions from other controlled states against the Ottoman Empire.