With the proclamation of the Cretan Revolution in 1896 he went to Crete, where he led the Holy Corps, which he created.

During the First Balkan War he led a corps of Cretan volunteers in the Epirus front.

In April 1913, he was killed in action when his plane crashed in Langadas during a reconnaissance flight to a Bulgarian camp.

In 1905 he published a translation of Sophocles' Antigone in the elementary school, a pioneering event for his time.

Konstantinos Manos was among those who saw the undertaking by Greece of the organization of the first modern Olympic Games, in 1896, as a unique opportunity to promote national law.

[5] Konstantinos Manos was the first to offer money for the Olympic Games, and in fact the important amount of 10,000 drachmas for that time.

The deletion from the National Olympic Committee is a tangible item that no longer enjoyed the favor of the palace.