Replying to Full Metal Jacket audio clip in ski vid??

OKay i saw full metal jacket last week and i recongized a part in the movie that is used in a ski video.

I think the quote is something like this
'We've come across stron enemy forces, request tank support'

Well it's been driving me crazy all week, what movie is this quote in? I watched happy dayz and RFA but didn't hear it, so does anyone remeber?