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.

What was the role of elves in the First Age?

 In J.R.R. Tolkien's Middle-earth legendarium, the Elves played a central role in the events of the First Age. They were one of the oldest and most powerful races in Middle-earth, and they played a significant role in shaping the course of the First Age.

During the First Age, the Elves were divided into several different groups, each with its own unique culture and history. The most important of these groups were the Vanyar, the Noldor, and the Teleri. The Vanyar were the tallest and most beautiful of the Elves, and they lived in the realm of Valinor, the land of the gods. The Noldor were a highly skilled and technologically advanced people, renowned for their knowledge of crafting and their love of wisdom. The Teleri were a more peaceful and contemplative people, known for their love of music and their connection to nature.

During the First Age, the Elves played a vital role in the struggle against the darkness that threatened Middle-earth. Many Elves, particularly the Noldor, fought against the armies of Morgoth, the Dark Lord of the First Age, and played a key role in defeating him and bringing an end to the First Age. The Elves also played a significant role in the creation and governance of the realms of Middle-earth, and many Elves held positions of power and influence in the First Age.

Overall, the Elves were a vital and influential presence in the First Age, and their role in shaping the course of Middle-earth's history was significant.