Why did harrison attack prophetstown while tecumseh was away? what do you think his fear was if tecumseh was successful in uniting a confederacy of native americans?

On November 8, 1811, Harrison torched Prophetstown when Tecumseh was away for battle.

Explanation:

Shawnee tribe is a American native tribal community who were settled east central United States of America. They have their own language which is called as Algonquian. Tecumseh was a leader of the Shawnee tribe who was in mission to unite all native tribes of America to fight against the expansion of white’s territory in their native land.

When Tecumseh was away from Prophetstown because of battle and besides this Tenskwatawa also known as ‘The prophet” was confused which caused the Native Americans to immediately abandon Prophetstown. This has helped Harrison to torch Prophetstown on November 8, 1811.  

explanation:

queer

not sure might be he acquired the entire oregon territory from great britain