War of the Bavarian Succession
Kienmayer began his military career in 1774 as a cadet in the imperial Austrian "Puebla de Portugalo" Infantry Regiment # 26. In 1775 he was promoted second lieutenant in the "Jung-Modena" Dragoon Regiment # 8. As a member of the Barco Hussar Regiment # 35, he participated in the War of the Bavarian Succession in 1778.