Matt had moved his mobile suit closer, getting within visual distance of the other mobile suits. As he'd kept watch on his sensors, closing the distance, he'd been alarmed to see another machine take the field. All of them had converged though there seemed to be no shooting going on. And there was a ship, too! 
The closer he got, the more details he could make out. And to his eye, the suits looked... familiar. Not ones he recognised completely, but they had a certain Gundam-ness to them, but of no make nor model he recognised. And similarly, the ship reminded him of the Pegasus-class carriers from the One-Year War and after, but it was larger, sleeker, and looked more advanced. None of the mobile suits or the ship were transmitting any kind of IFF that he recognised either.
He drew himself to a stop within range of his weapons, but not so close that he couldn't move away should things go south; despite the fact they outnumbered him, and looked all-too well-armed. Radio chatter flew back and forth - and, surprisingly to him, there seemed to be no Minovsky Particle interference at all. Rolling the dice, he broadcast on an open frequency after listening for a few moments. 
"Attention unidentified mobile suits," he said cautiously, but with a firm voice. "I am Major Matthew Fox of the Earth Federation Forces. I mean no harm or ill intent. Can you identify yourselves, or this place?"