Post here you Gold, Silver Bronze and Honorable mention for the greatest tactical victory (any conflict) of the 20th century... if it happens to be a strategic victory too, thats fine, but shouldn't effect your rating
Gold - The Central powers offensive at Caporetto in 1917, they basically obliterated the entire Italian Army of 50+ divisions with 14 assault divisions and inflicted casualties (especially prisoners) in excess of 10 to 1. They literally tarnished the military reputation of Italy for a century in a battle, during a war they lost
Silver - Army Group Center's defensive stand on the Oka line during operation Mars. They inflicted casualties of 9 to 1, and decisively blead the Russian central fronts white, when all other sections of the German army where in a world of hurt. Model handed Zhukov his ass on a plate
Bronze - Army Group Center and South's capture of Kiev in 1941. They destroyed an entire military district in the mother of all encirclements despite being outgunned and outnumbered
Honorable mention - The Africa Corps victory in the battle of Gazala, despite being outnumber 2 to 1 they inflicted casualties of 3 to 1, and decisively crushed a sturdy defensive line on the most shoestring of logistics... it was THE embarassing performance of the British army in the desert