He was an amateur swordsman, competing in the 1896 Athens Olympics, and served in the Organizing Committee for the 1906 Intercalated Games.

Konstantinos Miliotis-Komninos was born in Ermoupolis in the island of Syros in 1854, and enlisted in the Hellenic Army on 11 April 1877 as a volunteer, serving in the cavalry.

[2] In 1905, as a major, he was aide de camp to King George I of Greece, and was appointed an honorary Commander of the Royal Victorian Order.

In 1919, as a Lieutenant General, he became the first head of the Army of Asia Minor in the Smyrna Zone allocated to Greece by the Treaty of Sèvres, until the arrival of Lt. Gen. Leonidas Paraskevopoulos.

He placed third of four in his preliminary group after winning one bout, against Georgios Balakakis, and losing the other two, to Eugène-Henri Gravelotte and Athanasios Vouros.