Hot answers tagged crimea
There are not many situations of annexation or unification in recent history, and most of those are accompanied by warfare or guerrilla violence. So this is a relatively unusual situation. Given the narrow question you asked, the most obvious answer is German unification. The DDR/GDR basically just dissolved and those East German Lander were incorporated ...
The Romans took over a few provinces, especially in the East, by being named heir by the last king. Pergamum and Bythinia, at the minimum.
Similar examples are the Anschluss of Austria; the annexation of Sudetenland (but there was an explicit agreement of France and Great Britian and there had been fighting in previous attempts); and the establishment of the Protectorate_of_Bohemia_and_Moravia. Later these turned out to not be so bloodless, but initially it was achieved without much loss of ...
Only top voted, non community-wiki answers of a minimum length are eligible