The first opium war was fought between China and Britain.
Tsar Nicholas II gives up the throne after a coup led by Lenin and the Bolshevik party.
<span>Both Abraham Lincoln, who was a key figure in creating political legislation in support of Black rights in the Reconstruction, and Andrew Johnson, who pardoned large numbers of slaveowners, were dead by 1877 - Lincoln in 1865 and Johnson in 1875.</span>
<span>artificial intelligence
biomedical technologies
agricultural technologiesl
atomic bomb
drones</span>