There had been trading relations between India and the west from ancient times itself (land route).
However, in 1453, the Ottoman Turks captured Constantinople and this brought the regular trade routes under the control of the Turks. This urged the Europeans to search for new trade routes, especially by sea.
In 1492, Columbus from Spain set out to reach India and discovered America instead.
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Answer:
There had been trading relations between India and the west from ancient times itself (land route).
However, in 1453, the Ottoman Turks captured Constantinople and this brought the regular trade routes under the control of the Turks. This urged the Europeans to search for new trade routes, especially by sea.
In 1492, Columbus from Spain set out to reach India and discovered America instead.