Robert Baden-Powell learned of the practicality of the Boss of the Plains hat through his association with Frederick Russell Burnham during the Second Matabele War of 1896–97, and he popularized the "lemon squeezer" style (i.e. flat brim with four dents at 12, 3, 6 and 9 o'clock) during the Siege of Mafeking in the Second Anglo-Boer War. When Baden-Powell established the South African Constabulary in 1900, he chose the Boss of the Plains as their uniform headgear. Popular culture has it that, on receiving the first shipment of hats from the Stetson company, the handbill identified them as 'hats, B-P style', which was misconstrued as an allusion to Baden-Powell's initials. Baden-Powell later adopted the hat for use by the Boy Scouts.