Russia has lost 687,600 troops since the beginning of its full-scale invasion of Ukraine on Feb. 24, 2022, the General Staff of Ukraine's Armed Forces reported on Oct. 26.This number includes 1,690 casualties Russian forces suffered over the past day.According to the report, Russia has also lost 9,109 tanks, 18,332 armored fighting vehicles, 27,460 vehicles and fuel tanks, 19,782 artillery systems, 1,240 multiple launch rocket systems, 984 air defense systems, 369 airplanes, 329 helicopters, 17,726 drones, 28 ships and boats, and one submarine.Russia again suffers 2nd deadliest day since start of full-scale invasion, Ukraine claimsFor the second time this month, Russian forces have suffered their second deadliest day since the start of the full-scale invasion of Ukraine, according to figures released by Kyiv.