He was initiated into Filiki Eteria.
When the revolution was declared, he rushed to Peloponnese and established, along with his brother Anastasios and his cousin Konstantinos, a military contingent of 350 men from Kefalonia equipped with two cannons, contribution of Evangelinos Panas.
Among the leaders were Victor Gerasimos Fokas, Konstantinos Fokas Karandinos and others.
Claiming that they were chasing pirates, they boarded a ship belonged to Anastasios and Fokas Theodoratou brothers, which was equipped with 18 cannons, 50 sailors and 50 gunmen.
They disembarked in early May 1821 in Glarentza and marched to Manolada.
There, they were joined by other military captains (Vilaetis, Sisinis and Plapoutas) and then marched to Lalas, which was the foothold of notorious Albanian fighters.
During the battles that took place in the region and until 13 June, when all the people from Lalas had to resort to Patra, Metaxas was among the noteworthy.
He even got wounded in both hands by bullets.
Later, after Demetrios Ypsilantis' suggestion, he was sent, along with the rest of the army, to Patra.
Soon, due to his injury, he was only active in the political part of the revolution.

On 25 May 1822, in a unanimous decision, the "Executive Body" passed an act by which Metaxas was naturalized as a Greek Peloponnese citizen for his service to his country.
He was appointed Minister of Police in 1822, and Minister of War in April 1826.
He took part in, and also organized the defense during, the Battle of the Lerna Mills.

He was a member of the National Assembly of Argos and member of the Provisional Government.
Along with Georgios Mavromichalis and Germanos III of Old Patras, he was sent by the Government to Verona in search for financial resources but also to persuade the Great Powers to not act against Greece, in which he succeeded with the help of his friend Ioannis Kapodistrias.
He was initiated into Filiki Eteria. When the revolution was declared, he rushed to Peloponnese and established, along with his brother Anastasios and his cousin Konstantinos, a military contingent of 350 men from Kefalonia equipped with two cannons, contribution of Evangelinos Panas. Among the leaders were Victor Gerasimos Fokas, Konstantinos Fokas Karandinos and others. Claiming that they were chasing pirates, they boarded a ship belonged to Anastasios and Fokas Theodoratou brothers, which was equipped with 18 cannons, 50 sailors and 50 gunmen. They disembarked in early May 1821 in Glarentza and marched to Manolada. There, they were joined by other military captains (Vilaetis, Sisinis and Plapoutas) and then marched to Lalas, which was the foothold of notorious Albanian fighters. During the battles that took place in the region and until 13 June, when all the people from Lalas had to resort to Patra, Metaxas was among the noteworthy. He even got wounded in both hands by bullets. Later, after Demetrios Ypsilantis' suggestion, he was sent, along with the rest of the army, to Patra. Soon, due to his injury, he was only active in the political part of the revolution.
On 25 May 1822, in a unanimous decision, the "Executive Body" passed an act by which Metaxas was naturalized as a Greek Peloponnese citizen for his service to his country. He was appointed Minister of Police in 1822, and Minister of War in April 1826. He took part in, and also organized the defense during, the Battle of the Lerna Mills.
He was a member of the National Assembly of Argos and member of the Provisional Government. Along with Georgios Mavromichalis and Germanos III of Old Patras, he was sent by the Government to Verona in search for financial resources but also to persuade the Great Powers to not act against Greece, in which he succeeded with the help of his friend Ioannis Kapodistrias.
Andreas Metaxas