They ran out of artillery shells. And oil.
They've always just relied on their large amount of biomass to send waves of subhumans to overwhelm their victim, unfortunately this doesn't work in the 21st century, and barely worked in the 20th century, we have drones and bombs and tanks now. Russians are also still getting dumber due to mass brain drain and race mixing with their 40% minority population.
>>538053782>>538053865>>538054153oh look its new europe>Between the 16th and early 20th centuries, the Ottoman Empire fought at least 17 wars against the Russian Empire and lost all of them.