I remember the U.S. government slapping tariffs on Australian sheep not too long ago, not a trade war exactly, more like a scuffle.
By the way, you missed the Wall St. Journal's howler of an editorial on the recent G8 meeting. They blamed the growing "anti-globalization" movement on Bill Clinton, saying one of the worst things he's ever done was to legitimatize the protesters at Seattle. Also, they called the leaders of the most powerful nations chickenshit for retreating to a remote mountain top location for the next summit.
Peter