At the age of 33, Magellan applied to Portuguese King Manuel to organize a fleet to explore and sail around the world. But the king didn't agree, because he thought that the eastern trade had been effectively controlled and there was no need to open up new navigation channels.

15 17, he left Portugal and went to Seville, Spain, where he once again requested to sail around the world. The commander of the fortress in Seville appreciated his talent and courage very much and agreed to his request and married his daughter.

15 18 In March, King Carlos I of Spain received Magellan. Magellan once again made a request for navigation and presented the king with a homemade exquisite colored globe. The king quickly agreed to him. Soon, under the instructions of the king, Magellan organized a fleet to prepare for sailing.

However, the Portuguese king soon knew this, and he was afraid that Magellan's voyage would help Spain surpass Portugal. So, he not only sent people to create rumors in Seville, but also sent some spies to sneak into Magellan's fleet, ready to kill and assassinate Magellan.