On the collapse of the Tsarist regime in February 1917, Olga's sister-in-law left Pavlovsk with her family, but Olga stayed, soon to be almost alone except for a single young domestic named Anna Egorova. (After the Revolution, Egorova entered the service of Prince Christopher of Greece and became the governess of his son, Michael.) Short of food, the two women were limited to eating a little dry bread soaked in poor quality oil. Their safety was far from assured, and a few days after the October Revolution, Bolsheviks invaded and ransacked the palace. Olga was physically unharmed. She accepted the need to leave Russia, but the Bolsheviks refused to let her go and diplomatic help from Greece was not forthcoming in the aftermath of the National Schism. In June, Constantine had been deposed and exiled to Switzerland. As the Allies did not wish to establish a Greek republic or see Crown Prince George succeed his father, Constantine was replaced on the throne by his second son, Alexander, who was thought to be more favorable to the Allies and more malleable than his older brother. Venizelos held power and the supporters of the deposed king were arrested or executed.