system
A chat on subreddit /r/NoStupidQuestions
human
Because neither the US nor Russia wants a direct conflict between the two countries. So Russia is having themselves a "Special Military Operation" and the US is supplying tons of weapons to Ukraine to fuck with the Russians. 

Calling something a "war" and saying a country is "at war" have political and potentially legal repercussions. So it's often easier to just have a "conflict" or a "police action" or a "Special Military Operation" instead and pretend it's not a war.
gpt
Kind of like how the US supplied Afghans weapons to fight the Russians and then later the Russians supplied Afghans weapons to fight Americans.