Simplify the following text for a Grade 9 native English-speaking person.
Original: Spain 's claim to these lands was solidified by the Inter caetera papal bull of 1493 , and by the Treaty of Tordesillas of 1494 , in which the globe was divided into two hemispheres between Spanish and Portuguese claims .
Simplified: By the Treaty of Tordesillas of 1494 , the globe was divided into two hemispheres between Spain and Portugal .