Was Crocodile stronger at Marineford? Or was he holding back in Alabasta?

 During the Alabasta arc, Crocodile displayed a level of power that was initially considered overwhelming by the Straw Hat Pirates. He possessed the Logia-type Devil Fruit called the Suna Suna no Mi (Sand-Sand Fruit), which granted him the ability to control and transform into sand. He had a reputation as a Shichibukai and controlled the desert kingdom of Alabasta from the shadows. His strength was showcased through his battles with Luffy and others. At Marineford, Crocodile was present as part of the war that took place at Marine Headquarters. While he did participate in the battle, he didn't display the same level of dominance as some other powerful characters present. This has led fans to speculate that he might not have been as strong as initially portrayed in Alabasta. It's important to note that power scaling and character abilities can be subject to interpretation and development by the author. Oda often keeps details deliberately open-ended to keep the story intriguing.

How did the European Union help end the Cold War?

 The European Union (EU) played a significant role in helping to end the Cold War, which was a period of political and military tension between the Western powers, led by the United States, and the Eastern powers, led by the Soviet Union, that lasted from the late 1940s to the early 1990s.

One of the key ways in which the EU helped to end the Cold War was through its efforts to promote economic integration and cooperation among the countries of Europe. The EU was founded in the aftermath of World War II as a way to promote peace, stability, and prosperity in Europe, and it worked to create a single market for goods, services, and capital among its member countries. This process of economic integration helped to bring the countries of Europe closer together and to reduce the divisions that had fueled the Cold War.

In addition to promoting economic integration, the EU also played a role in supporting the process of political and social reform that took place in Eastern Europe during the late 1980s and early 1990s. As part of this process, the EU provided financial and technical assistance to countries in Eastern Europe that were transitioning to democracy and a market economy. This support helped to pave the way for the peaceful revolutions that took place in countries like Poland, Hungary, and Czechoslovakia, and it contributed to the overall process of reconciliation and cooperation that helped to end the Cold War.