Exactly. They were the hosts of the Football World Cup from 1982 to 1994.
When I saw the first two clues on last Monday's "Only Connect", how I wished I could be on the show. I would have buzzed after just those two clues and given "USA" as my answer - and I would have got it right! The fact that third in the sequence was the flag of Texas rather than the flag of Italy would have been totally irrelevant - I would have got the question right despite my wrong reasoning!