Out of Russia: Flag of the Crimean Tatars
Tatars are an interesting bunch. Mongol Muslims inhibiting Eastern Europe. The most well known variation are probably the ones from Tatarstan in the Russian federation, but Tatars also have their own installment in Poland/Lithuania (Lipka Tatars), various regions in Siberia, and of course, Ukraine in the form of Crimean Tatars.
This flag is a flag for the peoples rather then the region of Crimea (which has their own flag). It has a long history associated with the Crimean Khanate which existed since the Middle Ages before eventually annexed by the Russian empire, and fell into the hands of the USSR.
Freshly off the Ukrainian conflict news you would hear more about the Crimea region being more pro-Russia, but in general, Crimean Tatars don’t have the same sentiment, perhaps due to the fact that Stalin during his reign expelled many Crimean Tatars to Siberia although post-USSR dissolution, many of them came back, and Crimean Tatars nowadays make up around 12% of the Autonomous Republic of Crimea.