In US the government sold land that it didn't own to armed civilians and then sent its armies to help with negotiation and settling things. Russia occupied Siberia by sending explorers and then government officials to siberian chieftains requiring submission under Russian tsarists crown by threatening them with military invasion. Then it was not uncommon in Russia for various ethnic populations to be moved (willingly or not) from one place to another in order to accomplish some political agenda. So neither US nor Russia have not "grew into" just like that.