Indicate a noun phrase from given statement which mentions a pronoun.

Let me give you an example: this book introduced shakespeare to ovid; it was a fine selection of his writing.
The answer to this example can be: his writing
Here is why: in this statement the pronoun is his and his writing is referring to the quote in the sentence using the pronoun

OK. solve this:
in july, kamtchatka declared war on yakutsk. since yakutsk's army was much better equipped and ten times larger, they were victorious within weeks.
Answer:
they were victorious