Lightingfirestocreateasmokescreenisanancientruseinmilitarytactics.In1701,inabattlewiththeSaxons,whowereencampedonthesouthsideoftheDvina,theSwedesmadeuseofthestrongnorthwindbythefiringofvastquantitiesofwettedstraw.Adensesmokesweptacrosstheriver.Undercoverofthisdensecloudseveralboatssneakedacrossloadedwithstillmorestraw,whichwasthenignitedonthesouthbank,completelyblindingandstiflingtheSaxonsandrenderingitimpossibleforthemtoknowifthepassageoftheriverwasbeingattemptedornot.WhentheSwedesatlastdidcross,theenemy'sforcesweresoconfusedandblindedbythesmokethattheirgunswereworkedatrandomandwithlittleeffect.