I'm sure everyone would agree a god knife is a must have tool first and a weapon 2nd . But there is several incedents in this time of modern warfare that a knife was the best weapon at the right . Just in Iraq in close quaters a Marine killed a madi army fighter in the swampie low lands with a KA BAR , another U.S soldier used a M9 bayonet attached to his M4 while room clearing and in a tough hand to hand fight while sweeping a building another managed to get to his multi tool ( a Gerber I think ) and cutt a insurgents throat .