<P> The Treaty of Zaragoza laid down that the eastern border between the two domain zones was 297.5 leagues (1,763 kilometres, 952 nautical miles), or 17 ° east, of the Maluku Islands . The treaty included a safeguard clause which stated that the deal would be undone if at any time the emperor wished to revoke it, with the Portuguese being reimbursed the money they had to pay, and each nation "will have the right and the action as that is now ." That never happened however, because the emperor desperately needed the Portuguese money to finance the War of the League of Cognac against his arch - rival Francis I of France . </P> <P> The treaty did not clarify or modify the line of demarcation established by the Treaty of Tordesillas, nor did it validate Spain's claim to equal hemispheres (180 ° each), so the two lines divided the Earth into unequal portions . Portugal's portion was roughly 191 ° of the Earth's circumference, whereas Spain's portion was roughly 169 ° . There was a ± 4 ° margin of uncertainty as to the exact size of both portions, due to the variation of opinion about the precise location of the Tordesillas line . </P> <P> Under the treaty, Portugal gained control of all lands and seas west of the line, including all of Asia and its neighbouring islands so far "discovered", leaving Spain with most of the Pacific Ocean . Although the Philippines was not mentioned in the treaty, Spain implicitly relinquished any claim to it because it was well west of the line . Nevertheless, by 1542, King Charles V had decided to colonise the Philippines, assuming that Portugal would not protest too vigorously because the archipelago had no spices . Although he failed in his attempt, King Philip II succeeded in 1565, establishing the initial Spanish trading post at Manila . As his father had expected, there was little opposition from the Portuguese . </P>

Who had most of asia in its sphere of interest after the treaty of saragossa