This is an error correction.
In my previous post, I referred to the Ottoman Empire’s flag as a crescent in reference to the reign of Selim 1. This was not correct. The Ottoman empire had a number of flags and the crescent and star on a red background was adopted long after Selim’s reign. I’m not actually sure what flag Selim flew. The red crescent and star was in my head, but that’s mostly due to WW 1.
So anyway, my mistake there.