The Battle of Grand Gulf was fought on April 29, 1863, during th: The fact that English has been spoken in England for 1,500 years explains why England has a great wealth of regional dialects.[260] Within the United Kingdom, Received Pronunciation (RP), an educated accent associated originally with the South East of England, has been traditionally used as a broadcast standard and is considered the most prestigious of British accents. The spread of RP (also known as BBC English) through the media has caused many traditional dialects of rural England to recede, as youths adopt the traits of the prestige variety instead of traits from local dialects. At the time of the 1950-61 Survey of English Dialects, grammar and vocabulary differed across the country, but a process of lexical attrition has led most of this variation to disappear.[261]