japanese samurai attacking mongol ship th century western europe since late th century conflicts battles taken place ref name war http wwwralphmagorg cg world war one html world war one new kind war part ii '' understanding great war'' st phane audoin rouzeau annette becker ref th century war resulted dramatic intensification pace social changes crucial catalyst emergence political left force reckoned ref name kolko xviitoxviii war century became
Applied science Military sciences Grand strategy War