悪戦苦闘[akusenkutou] hard fighting
暗闘[antou] secret feud
階級闘争[kaikyuutousou] class struggle
挌闘[kakutou] hand-to-hand fighting
格闘戦部隊[kakutousenbutai] shock troops

敢闘[kantou] fighting bravely
共闘[kyoutou] joint struggle
苦闘[kutou] agonizing
激闘[gekitou] fierce fighting
決闘[kettou] duel