I'm currently reading Michael Smith's "Station X" - a book about the work that went on in Bletchley Park during World War Two (although there are a good couple of chapters on the historical background). In it he recounts a story told by Barbara Abernethy (who went on to marry an American codebreaker, Joseph Eachus. She was PA to Alastair Denniston, head of Bletchley Park) - concerning a Fourth of July game -"We were challenged by the Americans to a game of rounders. They nearly went home. Now in the United States, you don't need to get all the way home in one go to score. As long as you get all the way home eventually you score. Now our rules for rounders of course were very tough. You had to go all the way round in one go.
It was a lovely day, we all played well, and at the end of the game we all sort of clapped each other on the back and the Americans said: 'well, we're sorry we beat you' and the British captain said: 'I'm sorry, but we beat you.' The Americans were a little touchy. They were convinced that they'd won and it took a bit of explanation on somebody's part to soothe ruffled feathers. It all ended with drinks all round, actually we agreed we'd won by our rules and they'd won by their rules. So that was alright. But they never asked us to play again."
