To distinguish him from his son who had an identical name, he is generally referred to as Johan August Meijerfeldt the Elder.
Johan August Meijerfeldt was born into a Baltic-German family in Oberpahlen, Livonia (now Estonia) and entered Swedish military service in 1684.
Later that year he was promoted to lieutenant general and made commander of the Swedish troops in Stettin.
He had to leave Pomerania briefly after the fall of Stralsund to a Prussian-Saxonian-Danish army that same year but returned after the end of the war.
[1] He has been described as one of the most accomplished generals serving under King Charles XII of Sweden, and as a successful civil servant.