In March 1917 Nicholas II abdicated in favour of his brother Michael ( Alexei considered too frail). Michael was a controversial figure who had married a twice-divorced woman (Countess Brasova, as she became, was never accepted by the court) and had known periods of exile. The Bolshevik revolution finally put paid to the monarchy and the Grand Duke was imprisoned and then killed in June 1918.
As tragic as they were all beautiful: The last Imperial family of Russia abord the yacht “Polar Star”, 1906. Grand Duchesses Olga, Anastasia and Tatiana behind their parents, Tsar Nicholas II and Empress Alexandra, whilst Tsarevich Alexei and Grand Duchess Maria pose in the front. Imperial Russia
After the February Revolution of 1917, he and his family were sent into internal exile in Tobolsk, Siberia. He was murdered alongside his parents, four sisters, and three retainers during the Russian Civil War by order of the Bolshevik government, though rumors that he had survived persisted until the 2007 discovery of his and one of his sister's remains.