Russo-Persian Treaty of Friendship (1921)

[3] The original purpose of the treaty was to prevent White Russian counter-revolutionary forces who fled to Iran after the Bolshevik Revolution from attacking the Soviets from Iranian territory as had happened as late as 1918.

The passage of the treaty, and particularly articles 5 and 6, was subject to vigorous debate in the Persian parliament; anti-British sentiment, however, lead to its acceptance without alteration.

(The Shah of Persia demanded Soviet clarification of Articles 5 & 6 of the Treaty of Friendship) "Tehran, 12 December 1931 Your Excellency, In reply to your letter dated 20th day of Ghows, I have the honour to inform you that Articles 5 and 6 are intended to apply only to cases in which preparations have been made for a considerable armed attack upon Russia or the Soviet Republics allied to her, by the partisans of the regime which has been overthrown or by its supporters among those foreign Powers which are in a position to assist the enemies of the Workers' and Peasants' Republics and at the same time to possess themselves, by force or by underhand methods, of part of the Persian territory, thereby establishing a base of operations for any attacks—made either directly or through the counter-revolutionary forces—which they might meditate against Russia or the Soviet Republics allied to her.

I myself fully share this attitude, and would be prepared, should friendly relations be maintained between the two countries to promote negotiations with a view to a total or partial revision of these Articles on the lines desired by the Persian Government, as far as the interests of Russia permit.

In view of the preceding statements, I trust that, as you promised me in your letter, your Government and the Mejlis will ratify the Treaty in question as soon as possible.