I'd like to suggest some alternatives for the non sequitur, "[Winning team] have claimed victory over the battle." The grammatical issue can be solved simply by excising "over the battle", ie '[Winners] have claimed victory!'. However the syntactic issue arising because the team names are in both singular and plural form (eg United States Army & Iraqi Insurgents), and therefore the auxiliary verb succeeding the team name (ie have/has) has to change accordingly, would require a slightly more complex fix, and is probably not worth the effort.
If you want to fiddle about with extra fields or whatever, here's some more ideas:
The [Winners] (is/are) victorious!
You have claimed victory over the enemy!
The ([Your force] has/[Your forces] have) claimed victory over the [their force]!
You are victorious!
You have defeated the enemy!
The ([Your force] has/[Your forces] have) defeated the [their force]!
You have won the battle!
You win!
You have won!
The ([Your force] has/[Your forces] have) won!
You have (annihilated/destroyed/terminated/neutralized/terminally rogered... etc) the enemy!
The ([Your force] has/[Your forces] have) [verb]ed the [their force]!
Clear!
Thank you for supporting the global military industrial complex! (Insert oil/have more dimwit kids/obey unquestioningly) to continue!
"Game over - You a winnah - hahaha!" is less grammatically correct but I'll put it on the list anyway.
Some alternative losing messages; 'You lose', 'You lose, sucka', 'The ([Your force] has/[Your forces] have) been defeated!', 'The ([Your force] has/[Your forces] have) been defeated by the [their force]!', 'Your team has lost its ability to re-animate its dead - [their force] zombies win! Hope you enjoyed this zombie mod! Support your local zombies!', etc
My personal preference would be for something simple - 'You win/lose', 'You are victorious/have been defeated', or 'The [you] (has/have) (won/lost) the battle(!/.)'
Also, perhaps it may be a good idea to add a list of the existing load screen tips on the suggestions forum so that they may be checked more easily and completely.
While I'm here I'll mention that I can't exit the fixed MG in the bunker at the west entrance of firebase mercury on ramiel single player maps (it plays the nightvision noise when I try).
Finally, I'd like to suggest that blasting choppers with RPGs is awesome fun; yay PR
