Along with Demetrios Ypsilantis, he commanded the forces that saved Nafplio from Ibrahim Pasha of Egypt, during the Ottoman–Egyptian invasion of Mani.

He participated and excelled in the battles of Valtetsi, Lerna Mills, Vergas, Diro, Polyaravos, and others.

On 27 September 1831, the two Maniots were waiting by the doors of the church of Saint Spyridon in Nafplio.

However, Konstantinos was shot and wounded by Georgios Kozonis, the one-eyed and one-handed Cretan bodyguard of Kapodistrias, while at the same time the enraged crowd rushed against him.

Georgios took refuge in the French embassy, which protected him from the people who persecuted him, but was eventually forced to hand him over to the authorities for trial.