Complete the sentence about Suomenlinna with the correct year: Under Russian rule, the fortress served as a base for the Baltic Fleet during World War I, and in ______, construction began on the Krepost Sveaborg defense system.

Answer and explanation

Correct answer: A. 1915

Under Russian rule the fortress was a base for the Baltic Fleet in World War I, and in 1915 work began on the Krepost Sveaborg defence system.

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