The events taking place at the Island Cake Act have made Luffy known throughout the world. You can include: connections with foster brother Sabo, Chief of Staff of the Revolutionaries; creation of an unofficial fleet under its leadership; infiltration of Big Mom territory, defeat of two sweet commanders, attempt (unsuccessful) of murdering Charlotte Linlin, destruction of her castle (aimless) and creation of temporary alliance with Germa 66, Solar Pirates and crew of Fire Tanks. These achievements made him unofficially called the "Fifth Emperor".