American Dragon
I have fought against both these organizations and both have killed me more than once so I know how tough both of them are. EDf stands for Earth Defense Force for those who dont know. Which one would bury the other if these groups fought.
http://www.google.com/imgres?q=helghast&hl=en&sa=X&tbm=isch&tbnid=uSB7dgSS4r0leM:&imgrefurl=http://videogames.desktopnexus.com/wallpaper/51890/&docid=E9WpYbof3u_fRM&w=450&h=281&ei=h6ctTvGtIefh0QHO6NjkDg&zoom=1&iact=rc&dur=361&page=2&tbnh=109&tbnw=174&start=19&ndsp=19&ved=1t:429,r:13,s:19&tx=95&ty=50&biw=1366&bih=643
VS
http://www.google.com/imgres?q=edf+trooper&hl=en&tbm=isch&tbnid=CslDHEQYrmuipM:&imgrefurl=http://sonicfanon.wikia.com/wiki/File:EDF_Trooper.jpg&docid=ns8nPktpF0Tk3M&itg=1&w=278&h=558&ei=6KctTu3hDcrt0gHNmcnkDg&zoom=1&iact=rc&dur=211&page=1&tbnh=161&tbnw=84&start=0&ndsp=22&ved=1t:429,r:3,s:0&tx=29&ty=53&biw=1366&bih=643
http://www.google.com/imgres?q=helghast&hl=en&sa=X&tbm=isch&tbnid=uSB7dgSS4r0leM:&imgrefurl=http://videogames.desktopnexus.com/wallpaper/51890/&docid=E9WpYbof3u_fRM&w=450&h=281&ei=h6ctTvGtIefh0QHO6NjkDg&zoom=1&iact=rc&dur=361&page=2&tbnh=109&tbnw=174&start=19&ndsp=19&ved=1t:429,r:13,s:19&tx=95&ty=50&biw=1366&bih=643
VS
http://www.google.com/imgres?q=edf+trooper&hl=en&tbm=isch&tbnid=CslDHEQYrmuipM:&imgrefurl=http://sonicfanon.wikia.com/wiki/File:EDF_Trooper.jpg&docid=ns8nPktpF0Tk3M&itg=1&w=278&h=558&ei=6KctTu3hDcrt0gHNmcnkDg&zoom=1&iact=rc&dur=211&page=1&tbnh=161&tbnw=84&start=0&ndsp=22&ved=1t:429,r:3,s:0&tx=29&ty=53&biw=1366&bih=643