Odd question about military marching pace

[Jock Scot]

From memory, The Rifle Brigade--Sharpe's outfit were part of that, but I can't remember the connection-------march at 140 paces a minute whilst the rest of the British army march at 120 paces per minute. The faster pace of the Rifle Brigade was to cover more ground more quickly in their scouting and skirmishing role and were armed with rifled muskets rather than the smooth bore "Brown Bess" musket of the rest of the British infantry during the Napoleonic wars---"Sharpe's" time.