2019: Lost Memories

Overview
This is a short story consisting of timelines which is a homage to the Korean film "2009: Lost Memories", although the setting is in Finland and Russia instead of Korea and Japan.

Original Timeline
June 2019: An archeological expedition consisting of Finnish, Russian and German teams uncovered a huge artifact left over by "ancient astronauts "  in the forests of Finland, and a "blue crystal" which enables time travelling when inserted into the main artifact.

July 2019: 20 years old Russian ultranationalist Mikhail Petrov exploited the artifact to travel back to 1904 to stop Finnish nationalist Eugen Schauman from assasinating Nikolai Bobrikov the Russian Governor General of Finland. A Finnish history researcher named Milla followed him thereafter.

Altered Timeline (ATL)
16 June 1904: Petrov intercepted Schauman at the Senate House. He shot Schauman and became Bobrikov's friend. Milla began to hatch a long term plot to restore the timeline.

1905: With help from Petrov and Bobrikov, the Russian Empire turned the tide of the war against Japan and forced them to accept their annexation of Manchuria.

1906: Stalin and Lenin are assasinated under secret orders from the Tsar. For Petrov this could prevent the duo to ruin Russia with Communism.

1907: Petrov became the Governor General of Finland.

1910: The Russian Empire started a series of constitutional reforms to make it a constitutional monarchy akin to England.

1912: Petrov leads a team to secure the time travelling artifact to prevent attempts to restore the timeline.

1914: Start of World War I.

1917: Kerensky became the prime minister of the Russian Empire.

1918: The World War I ends with the full Russian annexation of Poland.

Somewhere in the 1920s: Milla met Elmo Kaila and form the Vihan Veljet group in attempt to get the original reality back.

1933: Adolf Hitler rose to power and began challenging Russian hegemony.

1934: Petrov became the Prime Minister of Russia.

1935: Hitler is assasinated by Russia's secret agents.

1940: A war against Japan erupts after the Asian power struck Vladivostok.

1950: After a lengthy war, Japan accepts surrender and is forced to cede its Northern territories to Russia and make Ryukyu independent.

1955: Russia launched the world's first satellite Sputnik I.

1956: Mikhail Petrov dies of natural causes. His descendants formed the Petrov foundation to safeguard the time-travelling secrets and the related artifacts.

1960: Russia launched Yuri Gagarin into space in the world's first human spaceflight mission.

1964: Vihan Veljet attempted their first attack against Petrov foundation.

1969: Tsarist Russia landed Alexei Leonov on the Moon, cementing its lead in space exploration.

1976: The Olympic Games is held in Moscow.

1980: A lunar colony is erected by the Tsardom.

2001: The Veljet group successfully obtained the Blue crystal in a large scale raid against Petrov foundation.

2004: Saint Petersburg hosted the Olympic Games.

2005: Tsarist secret police snatched back the Blue Crystal after a vicious firefight with Vihan Veljet.

2010: After a civil unrest in USA, Hawaii seceded from the Union.

2014: Sochi hosted the Winter Olympic Games.

2017: Vihan Veljet get the high ground again by taking back the Blue Crystal.

2019: Veljet raided an exhibition in Helsinki showing Petrov's artifacts  but failed to find the "main time travelling artifact" initially. However  Jukka  a Tsarist police detective began to second guess the whole reality after he investigate further into the raid incident and eventually defected to the Veljet when he learned the whole truth about the reality. During another gunfight between Russia and the Veljets the latter was almost exterminated, but Jukka managed to take the "Blue Crystal" and slipped aboard a cargo ship heading to Petrograd with ATL's Milla where the main artifact is stored. After Milla is killed in the ensuing police raid Jukka activated the time machine and travelled back to 1904 to intercept Petrov.

Restored TL
1904: After travelling back in time, Jukka went to the Senate House and shot Petrov, allowing Schauman to carry out his assasination. Thereafter he went to the site where the artifacts was found and destroyed those with dynamites before meeting Milla. 2019: The National Museum of Finland contains a team photo of Finnish independence fighters which Jukka and Milla is seen together, smiling.