How di Sir Francis Drake help the english claim the oregon country?

Answer 1

Whilst it is true that Sir Francis Drake in 1579 sailed up the West Coast of the Americas, it is not entirely certain how far North he got...certainly California, but there is some research that he got as far as modern day Oregon, Washington & British Columbia. Even if this was true there is no evidence that this journey helped claim Oregon country.

The English claim was helped by British Explorers in the 1770-1790s: James Cook, George Vancouver, and certain concession by the Spanish to the British made by politicians and then cartographers.

This claim (which was really a trading concession to British fur companies) covered British Columbia, Washington and for a while even part of Northen California.
The borders between British colonies and USA territory started to become more a little more defined after the Anglo American Convention of 1818, whereby this region was jointly administered by Britain and the USA, but not until the Oregon treaty of 1846 were the borders set as they are today.

Answer 2

This answer is for Dunrobin. (because above has it right)

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