Analysis of information sources in references of the Wikipedia article "Persian campaign (World War I)" in English language version.
The Russian military force, occupying not only Azerbaijan but the entire north and north-east of Iran, eventually amounted to almost twenty thousand by the outbreak of the First World War. After the opening of the so-called Persidskii front [the Persian front], which became the south flank of the First World War theatre, this number gradually grew to eighty or ninety thousand.
The Russian military force, occupying not only Azerbaijan but the entire north and north-east of Iran, eventually amounted to almost twenty thousand by the outbreak of the First World War. After the opening of the so-called Persidskii front [the Persian front], which became the south flank of the First World War theatre, this number gradually grew to eighty or ninety thousand.