[1] In the first stages of the Greek War of Independence, he took part along with his father in the military operations in Moldavia-Wallachia under the command of prince Alexandros Ypsilantis.
[2] After the suppression of the revolution in the Danubian Principalities, father and son returned in early August 1821, along with other fighters to the Peloponnese and participated in the Battle of the Ditch, where Apostolis was injured.
[11] During the Greek civil wars of 1824–25, although he was invited by Theodoros Kolokotronis to join him in the blockade of Nafplio and the siege of Tripoli, he adopted a neutral position.
[13][14] Later he participated in the military operations against Ibrahim Pasha[15] and he was elected by Theodoros Kolokotronis as general leader of the armed forces of Tripoli region.
[16] After the creation of the independent Greek state, he became in 1836 an officer of the Royal Phalanx and in 1845 he received the rank of colonel and was awarded with the Commemorative Medal of the War of Independence.