This particular category of wines is more common in the United States than in most other countries and is almost non-existent in European countries. These are wines that have no content or origin requirements that are named for distant and famous wine producing regions. It is a marketing practice that was especially common in the United States when the modern wine business was developing. If an American winery produced a sparkling wine, it was labeled as a 'Champagne' even though true Champagne can only be produced in the Champagne region of France. Similarly, if a wine was white and dry, it might be labeled 'Chablis' even though it bore little resemblance to a true French Chablis.
Most countries have treaty agreements that protect the names of important wine regions.
You'll never see a sparkling wine produced in Europe outside of the Champagne region of France that is labeled as Champagne. Sparkling wines from Italy are Spumante and those from Germany are called Sekt. In the United States and any other countries that allow generic naming, consumers become easily confused and often fail to appreciate the true quality of the real regions whose names are used to market inexpensive and inferior wines. If is usually harder to establish a proprietary brand, but if it is done successfully, the result can be much more profitable. Instead they face challengers from Beringer, Mondavi, Gallo and nearly every other large winery in California.