[3] Following the beginning of the War in Donbas in 2014, Chmut began volunteering to assist the Armed Forces of Ukraine through the Ukrainian Military Portal.

Following his graduation from the National Aviation University, he joined the Ukrainian Marine Corps in 2015, becoming a member of the 501st Separate Naval Infantry Battalion.

[4] He also continued to publicly report on problems within the Armed Forces, leading to a strained relationship with his commanders and his eventual redeployment outside of the Donbas in September 2015.

In the 137th Battalion, he received training from British and American instructors in military theory and the usage of unmanned aerial vehicles, respectively.

[1] After his departure from the Marine Corps, Chmut returned to the Ukrainian Military Portal before joining the Come Back Alive charity as an analyst at the end of 2017.