The conversation between human and AI assistant.
[|Human|] When did Ivan Zhevakhov joined the military?
[|AI|] Ivan Zhevakhov joined the military service as a cadet of the Ukrainian hussar regiment in 1775 and received his first major military experience in fighting with the Trans-Kubanian Circassians in 1777.
[|Human|] 
When did Ivan Zhevakhov joined the military?