Altermeier was promoted to
Offizierstellvertreter soon after joining his new squadron. He opened his score with his new squadron on 3 March 1917. often emblazoned with the triple rings of the Krupp Works, to down a
Nieuport 17. On 30 May 1917, he received the
Iron Cross, First Class. He triumphed four more times in September, with his last in this string coming on the 26th. He was then wounded, and did not score again that year. Altemeier was wounded for the third time on 25 July 1918, qualifying him for the Silver
Wound Badge. Altemeier went on hiatus until August, when he scored twice. He had two confirmed victories and one unconfirmed in both September and October 1918. His final victim, on 10 November, the day before the armistice, was his 21st victory and the squadron's 91st and final one. Altemeier and his
Staffelfuehrer (Commander),
Heinrich Kroll, had accounted for half the wins scored by their squadron. Altemeier was one of the few pilots entrusted with the most modern German fighter of World War I, the
Fokker E.V (sometimes called the
Fokker D.VIII). ==Post World War I==