Garrett Watts did fight in Rev. But on US side. I have his pension records for the US National Archives. Though Garrett was Half Cherokee he was also half Virginan and was raised with his American father. The battle refered to was Gates Defeat. He was also in several other battles on the AMERICAn side.
As far as the Indidans being recruited because of the "pretty red uniforms goes" many Indians like Garrett's brother John (Young Tassle) fought on the side of the British to get land returned. The Cherokees were experienced warriors and had fought most of their lifes at the time of the revolution. I can quarettee you they were not taken in by pretty uniforms. Read a few more history books.