Nearly a month into the fighting, one of the biggest surprises of the war in Ukraine is Russia’s failure to defeat the Ukrainian Air Force. Military analysts had expected Russian forces to quickly destroy or paralyze Ukraine’s air defenses and military aircraft, yet neither have happened. Instead, Top Gun-style aerial dogfights, rare in modern warfare, are now raging above the country.

“Every time when I fly, it’s for a real fight,” said Andriy, who is 25 and has flown 10 missions in the war. “In every fight with Russian jets, there is no equality. They always have five times more” planes in the air.

The success of Ukrainian pilots has helped protect Ukrainian soldiers on the ground and prevented wider bombing in cities, since pilots have intercepted some Russian cruise missiles. Ukrainian officials also say the country’s military has shot down 97 fixed-wing Russian aircraft. That number could not be verified but the crumpled remnants of Russian fighter jets have crashed into rivers, fields and houses.

The Ukrainian Air Force is operating in near total secrecy. Its fighter jets can fly from air strips in western Ukraine, airports that have been bombed yet retain enough runway for takeoffs or landings — or even from highways, analysts say. They are vastly outnumbered: Russia is believed to fly some 200 sorties per day while Ukraine flies five to 10.