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In page Russian America:

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A company ship visited the Russian American outposts only every two or three years to give provisions.[1] Because of the limited stock of supplies, trading was incidental compared to trapping operations under the Aleutian laborers.[1] This left the Russian outposts dependent upon British and American merchants for sorely needed food and materials; in such a situation Baranov knew that the RAC establishments "could not exist without trading with foreigners."[1] Ties with Americans were particularly advantageous since they could sell furs at Guangzhou, close to the Russians at the time. The downside was that American hunters and trappers encroached on territory Russians considered theirs.