Final answer:
The first Ponoka Stampede in 1936 is confused with the Charge of San Juan Hill, where Theodore Roosevelt led the Rough Riders in 1898. The historical leader of the first Ponoka Stampede is not widely documented.
Step-by-step explanation:
The question refers to the first Ponoka Stampede that took place in 1936. However, the reference provided about "THE CHARGE OF SAN JUAN HILL" and "WM.H.WEST IMPERSONATING COL. ROOSEVELT, LEADING THE FAMOUS ROUGH RIDERS TO VICTORY" appears to mix this event with the historical military engagement during the Spanish-American War in 1898, where Theodore Roosevelt famously led the Rough Riders. The Ponoka Stampede is actually a rodeo event in Canada, and while it certainly started around 1936, the leader or prominent figure of the first Ponoka Stampede is not widely documented as a historical personality like Colonel Roosevelt. Therefore, it seems there is a confusion between two separate events—the first Ponoka Stampede and the historical Charge of San Juan Hill.