Luer was transferred from
Armee-Flug-Park 4 (Army Flight Park 4) to
Jagdstaffel 27, a
fighter squadron, on 7 March 1917. At that time, he was ranked as an
Offizierstellvertreter (Deputy Officer). By August 1917, he had been
commissioned as a
Leutnant. On 14 August, he
shot down an observation balloon west of
Ypres at 1637 hours; that same day, he received the
Iron Cross First Class. On 9 September 1917, Luer shot down a
70 Squadron Sopwith Camel (serial number B3916) over Frezenberg. At 1010 hours on 24 October, he downed a
SPAD from
Naval Ten northeast of
Zonnebeke. His fourth victory came on 5 November 1917, when he destroyed another Camel. On 5 January 1918, Luer left
Jasta 27 to become the first
Staffelführer (Commanding Officer) of
Jagdstaffel 62. He would score his fifth victory with them on the evening of 22 April, when he scored another SPAD over Mezieres. He would tally one more victory on 16 May 1918, over a SPAD over Montdidier. On 22 May, he went to hospital until 1 July. On 8 July 1918, he was relieved from combat duty. ==Sources of information==