A conflict between the Russian fur traders and the Unalaska Natives occurs between 1763 and 1766; in the Fox Islands revolt of 1762, the Aleuts, in a coordinated attack, had attacked four Russian ships and and several shore parties, during which over three hundred Russians had been killed.

Evstratii Delarov's career in Russian America dates to at least 1764, when he is in the Aleutian Islands on board the Petr i Pavel under Ivan Maksimovich Solov'ev.

Delarov participates in Solov'ev's 1764 attacks on the Umnak-Unalaska Aleut alliance, carried out in revenge for the Fox Islands revolt.

Solov'ev directs the massacre of many natives.

Unalaska is temporarily used in the 1760s as a Russian fur trading post.