One Piece: Yonko Luffy's Territories, Explained

gamerant.com:

The Yonko are the pirates with most authority on the seas of the One Piece world, second only to the King of Pirates himself. As such, they have a tremendous influence that spans over multiple islands. The Yonko are powerful enough to take islands under their protection – meaning these islands rely on the Yonko to shield them from other pirates or the government. In exchange, they usually have to pay the Yonko back in material goods or man power.

One Piece: Characters Who Were Better Before The Time-Skip

Monkey D. Luffy has now reached new heights as a pirate after Wano's conclusion in the New World, contrasting his debut as a pirate with a small crew in East Blue. He started his journey in a small barrel and has now reached the rank of Yonko after defeating Kaido and his crew. With the said rise of Luffy to power, he has taken territories under his wing, with more to come along as the story progresses.

The underwater dream island that leads into the New World was the first island that Luffy took under his protection. Indeed, the beautiful island that is home to Mermaids and fish folk was under threat from Hody Jones, a Great White Shark Fishman, and the captain of the New Fishman pirates. Hody was an extremist believer of Arlong's ideals, going as far as murdering the late Queen Otohime out of his pure hatred for humankind.

While strong, Hody was dealt with effortlessly by Luffy and a bigger threat in Big Mom's underlings, Pekoms the lion Mink and Tamago, showed up. This was due to Luffy having eaten all of her candy, which the inhabitants used as payment to keep her at bay as the island was under her control. Originally, the island was under Yonko Whitebeard's protection, however, following the events of Marineford,