The aims of the mission were to help Romania join the war on the Entente's side and to improve the tactical training of the Russian army.

Janin met Tsar Nicholas II and found him to not know much about the state of his own army saying that "He was very poorly informed about current events.

[4] In July of 1918, he was appointed chief of the Allied military mission in Siberia during the Russian Civil War and as such, he commanded the Czechoslovak Legion in Russia.

[5] He took charge and met with the Supreme leader of Russia and commander of the White Army (Alexander Kolchak) the man he was supposed to aid.

Janin then handed Kolchak over to local Socialist-Revolutionaries in January 1920 along with a disputed number of wagons of gold to ensure their safety.

[7][8][9][10] Janin returned home to France shortly after this and defended the accusations that he had personally betrayed Kolchak and the anti-Bolshevik movement by saying that it was "fairy tales" and that people couldn't "imagine the real state of affairs in its true light".