Tealdo was an Algarvian soldier present at many key events in the early stages of the Derlavaian War. His company was part of the bloodless annexation/liberation of the Duchy of Bari. Later he took part in the successful invasion of Sibiu, where through thorough preparation and training and the use of unorthodox tactics his unit accomplished a quick and easy victory. More battlefield successes against Valmiera and Jelgava gave Tealdo and his fellow soldiers, including Trasone and their squad leader Sergeant Panfilo, the false impression that they were involved in an easy and victorious war against inferior enemies.