By March 1918 , when Russia left the war , around seventy Ilya Muromets had been constructed .
Ilya Muromets had flown over 350 bombing or reconnaissance missions along the entire Eastern Front .
By March 1918 , when Russia left the war , around seventy Ilya Muromets had been constructed , and they had flown over 350 bombing or reconnaissance missions along the entire Eastern Front .