[8] In the Grand Duchy of Finland, then a part of the Russian Empire, he attended Hamina Cadet School from 1882 to 1889.

[1] The Finnish Guard was ordered disbanded in 1905, beginning a lengthy process which lasted into 1906, and after he finally mustered out of it in 1906 he received a post-service termination salary for his time in the battalion.

[9] When World War I broke out in 1914, Wetzer returned to active military service in the Imperial Russian Army.

[2] Immediately at the beginning of the Finnish Civil War in late January 1918, Wetzer became an important figure in the organization of the White Army of Finland, as he was a close friend of General Carl Gustaf Emil Mannerheim, who had been appointed commander-in-chief.

As early as 5 February 1918, Wetzer was transferred to the Häme Group as commander and he took over the central Vilppula front, where the Red Guards repeatedly attacked to take over the strategically important railway crossing at Haapamäki.

By taking advantage of the anti-German sentiment of the Estonians, Kalm brought about the de facto expulsion of Wetzer, described publicly as a trip to the homeland because of health issues.

[9] He was also the chairman of the Finnish delegation to ceasefire negotiations between Finland and Soviet Russia in 1920[7] and a member of the Hornborg Committee defense audit of 1923 to 1926.

[9] After his military career, Wetzer worked in the Helsinki Court of Appeal as a notary in 1926 and as a legal adviser from 1927 to 1938.