In what year did constantinople fall?

Numbing feelings with addictive substances becomes a vicious cycle as the addiction itself often manifests further negative emotions

In the mid-1800s, native americans who had lived in the westtraded their manufactured goods with settlers. were able to resist diseases carried by settlers. offered their services as guides to settlers. prevented settlers from moving onto their territory.

What is significant about official languages in russian republics? why would it matter?