<span>CUBA, CASTRO, and the UNITED STATES ... Through the INRA Castro methodically seized all American holdings in Cuba</span>
The first republic to secede from the country of Yugoslavia in 1990 was "Slovenia," although it should be noted that other nations were already considered seceding before this.
The reasons why decolonization took place are many and complex, varying widely from one country to another. Three key elements played a major role in the process: colonized peoples' thirst for independence, the Second World War which demonstrated that colonial powers were no longer invulnerable, and a new focus on anti-colonialism in international arenas such as the United Nations.
They lost all overseas territories to the League Of Nations. Germany lost Danzig to Poland and Memel to Lithuania in eastern Europe.
In Western Europe Germany lost the territories of Alsace-Lorraine to France (which france had lost during the Franco-Prussian war) and Had lost a region to Belgium. I hope this helped!
