The Very Long Hedge

"The Indian equivalent of the Great Wall, the Customs Hedge, which is rarely mentioned in history books, was grown to prevent the smuggling of salt in response to the East India Company's oppressive Salt Tax. Composed of thorny trees and shrubs, this barrier covered 2500 miles and was attended by 12,000 men for 50 years before it was finally abandoned in 1879"

From the book "The Great Hedge of India" By Roy Moxham