Since 1919, close diplomatic relations were established between the RSFSR (hereinafter referred to as the USSR) and the Kingdom of Afghanistan, contrary to British interests. In April 1923, a new constitution was adopted in Afghanistan. Among the reforms carried out by Amanullah Khan were the prohibition of polygamy and marriage with minors, the abolition of the obligatory wearing of a veil for women , which led to the creation of a powerful opposition (primarily Muslim clergies).