On the fifth day of the Russian invasion of Ukraine, one of many unanswered questions is why Russia has launched a military campaign at huge cost with maximalist objectives, and then declined to use the vast majority of its fixed wing combat aircraft.
rusi.org is not russia.org :
The Royal (U.K.) United Services Institute (RUSI) … i like this better giving the context !
Edit : (after reading the article) Experts on the subject know a lot more than us, still many uncertainties remain.