Promoted to Sub-Lieutenant on 9 January 1899, he was appointed captain of gunboat "A" in 1900, and promoted to lieutenant on 15 November 1902. In 1908–09 he was active in the Macedonian Struggle, as head of the Drama–Kavala area. He participated in the Goudi coup in August 1909, but soon disagreed with the moderate leadership and launched his own abortive coup on 16 October 1909, in which the Light Squadron of destroyers, under his command, confronted the Battleship Squadron and forcefully denied it entry into the Salamis Naval Base. The coup failed, but Typaldos and his supporters were amnestied in January 1910. On 26 March 1910 he was promoted to Lieutenant First Class, and to Lt. Commander on 17 July of the same year. During the First Balkan War he commanded the destroyer , with which he participated in the Battle of Lemnos and the operations for the capture of Lesbos and Samos. In early June 1913, he was given command of the newly established 29th Naval Regiment, formed of naval personnel, which he led in the Second Balkan War against Bulgaria fighting in the area of Strumica, and then leading the temporary capture of Western Thrace. During the war, he was promoted to commander, on 1 July 1913.