He successfully defended the camp, twice, in the Battle of Valtetsi, leading a far inferior force to strengthen their positions, allowing new reinforcements to succeed in repelling the Turkish attack.

[1] On his way to Kiafa, his expeditionary force met action with a Turkish vanguard near the seaside village Mourtos, completely defeating their foes and taking a large number of prisoners.

His decision to take his captives to imprisonment in the Peloponnesus rather than to massacre them, as was then common, showed his military ethics, but at the same time weakened his already small regiment composed by 500 Maniots plus some Philhellenes, mostly former Bonapartist French soldiers and young romantic Italian revolutionaries.

[2] In his effort against a stronger and much more compact force under Omer Vryonis, but with the overall leadership of an excellent skillful commander like Hursid, who was an expert against guerrilla warfare, his band was at last defeated at an engagement in Splantza.

Maniot tradition and folk songs, show how his younger brother's death strongly hurt the brave Petrobey's soul: "Πετρόμπεης καθότανε ψηλά στο Πετροβούνι κι εσφούγγιζε τα μάτια του μ΄ ένα χρυσό μαντήλι.