during WWII, 35,000 japanese soldiers under yamashita defeated a force of 80,000-130,000 british troops under percival and forced them to surrender. gaining local aerial and naval superiority, and using feints and attacking from directions not expected by his opponent, yamashita was able to to keep his enemy demoralized and spread thin. yamashita also coordinated an excellent use of combined armies to gain local superiority in specific areas and kept his opponent off balance. casualties rates that i've seen were about 7000 for the british and 5000 for the japanese.

http://www.awm.gov.au/units/event_221.asp