Who was the first leader of military expedition sent by Russian Empire?

19.When did Samanids attach Khorasan to their possessions?

80. 
    20. Which state became the founders of the first centralized feudal state in Maverannahr with the capital in Bukhara?
    
81. 
    21.Which state had been ruling for 200 years, almost till the Mongol invasion in the 13th century?
    
82. 
    22.In the period of Samanid dynasty who was appointed the governor of Khorasan?
    
83. 
    23.When did Makhmud of Ghazni defeat and destroy Khwarezm?
    
84. 
    24.When did Seljuks conquer Maverannahr?
    
85. 
    25.During which reign territory of modern Uzbekistan was decorated with many wonderful palaces and buildings?
    
86. 
    What were the main consequences of the Mongol Empire to Mawarannahr?
    
87. 
    Name the first city which was conquered by the Mongol Empire?
    
88.