I know you made remarks on the turkish invasion and ottoman rise to power, but they were completely unrelated to both the thread and my comment, so I have no idea why you made them. They may have not been date specific but the question was, and so was my comment. I never said that the byzantine empire was the strongest in the world at the time, I said "undoubtedly the strongest state in Europe and the Mediterranean)", I even outright said that the song were still more powerful in my original comment. You say that your comment is a general comment on how Asian powers aren't taken seriously, but what does that have to do with my comment? I fully acknowledge that there were many strong powers in Asia.
There are some great Indian powers such as Guptas, Mauryas, Cholas (invaded SE Asia), Palas, Rashtrakutas and Pratiharas. Finally the Marathas who were in the middle of a Hindu reconquista which was rudely interrupted by the British. If not for Brits India would have been under wholesale Hindu rule in another 30-50 years.