Dee ihe na-aga n'ihu maka paragraf a - N'agha Austro-Prussian Hassel sonyere, dịka onye otu ndị agha na agha nke Hühnerwasser na Münchengrätz. Na 28 Julaị 1866 ọ ghọrọ onye isi ma jiri Order nke okpueze chọọ ya mma. N'ọnwa Machị 1870, ugbu a onye isi ndị otu, a kpọfere Hasel ọzọ, oge a na 35th Brandenburg Fusilier regiment. Site na mkpocha n'afọ ahụ megide France, ọ sonyeere General Staff nke Ngalaba nke 16. N'ọnọdụ a, o sonyere n'agha nke Spicheren
, Mars-la-Tour, Gravelotte, Amiens, Hallue na St. Quentin. O sonyekwara n'ọgụ Metz meriri. E buliri Hassel n'ọkwa ọzọ na 22 Disemba 1870, ugbu a ọ ghọrọ onye isi, ma nye ya obe Iron. Mgbe agha ahụ mechiri n'ụzọ iwu site na nkwekọrịta nke Frankfurt (1871), a kpọfere ya na General Staff nke 8th Army Corps.