I found this on the University of Washington's website:
"Historian Arther Ferrill notes that even towards the end, some of the old infantry formations were still in use. Such grouping was increasingly ineffective however, without the severe close order discipline, drill and organization of olden times. At the Battle of Chalons (circa 451 AD) Attila the Hun rallied his troops by mocking the once vaunted Roman infantry, alleging that they merely huddled under a screen of protective shields in close formation. He ordered his troops to ignore them and to attack the powerful Alans and Visigoths instead. It was a sad commentary on the force that had once dominated Europe, the Mediterrean and much of the Middle East. It is true that at Chalons, the Roman infantry contributed to the victory by seizing part of the battlefield's high ground. Nevertheless its day had already passed in favor of the mass levies of the barbarian foderates."
Does that prove that there were still some poorly organized Romans on the field or was it foederati trained in Roman manner?