Suterare Kishi No Gyakutenki! summary:

Alfred is a middle-aged royal guard knight who has served the kingdom for many years despite being a commoner. However, one day, he was falsely accused of embezzling the Royal Guard's budget. All his property was taken away and he was deported. Alfred is in despair due to the sudden incident, but the one who saves him is... She was the "Goddess of Picking" enshrined in the shrine that he had cared for for many years. Rejuvenated into a teenage boy by the power of the goddess, Alfred's life changed completely after he became the master of legendary weapons and dragons. Collect "throwaways" like yourself and take on the challenge of building your ideal nation!