Rudolf Kjellén publishes his book and makes the first reference to "Geopolitics"
Haushofer and Ernst Obst created a group that established the foundations of Geopolitics
Adolf Hitler publishes Mein Kampf, drawing inspiration from Karl Haushofer's teachings on Geopolitics
Hitler becomes the main power of Germany, uses the Nazi's school of geopolitics to justify his goal of expantion
The Nazi Party came up with its own definition of Geopolitics
Nicholas Spykman, an american geographer brought the term to the United States and added the element of national security to its definition/purpose
Haushofer was put on trial over his involvement with WW2 and the Nazi Party, he was eventually found innocent and he went on to publish "Defense of German Politics"
Morganthau comes up with a new definition, assuring that Geopolitics can determin power and a nation's destiny
Escalona Ramos defines Geopolitics in his book "Global Geopolitics and Geoeconomy"