Which country joined poland to form a powerful federation?

The persian empire finally fell to the armies of

Why was galileo galilei brought before the inquisition? for insisting that earth stands still at the center of the universe for proving that planets move in elliptical orbits for putting forth evidence that earth moves around the sun for suggesting that the sun is a star

What is the name of the social stratification set up by the vedic peoples of the indus river valley civilization