hah okay well i appreciate your help, however that trigger still wouldn't do it. it doesn't specify that the only units left are equal to just 1 player.
the trigger you posted will make it so that if their is A unit, no matter what other units are there, if their is A unit then the victory action will come up.
the trigger i want is somthing that if their is ONLY a single players units left then the action occurs.
for example:
the only units left on the map belong to player 2 blue, all the other players units have been killed.
however i believe that i have found away to do this on my own using player groups. but thanks for your attempted help anyways. mods can mark this with "ignored".