The history of the Lufthansa Group is somewhat convoluted because its formation is tied to the history of ‘Lufthansa’ itself. Despite there being no special date to define the birth of the Lufthansa Group, it has grown over time through acquisitions and mergers. The idea of the German group as a set of airlines united under the same name appeared after the re-establishment of Lufthansa after WWII and was developed mainly in the 1990s and 2000s.