Which empires would go last in a timeline of world civilizations?

In a timeline of world civilizations, the last major empires would include the British Empire, which reached its peak in the early 20th century before decolonization began in the mid-20th century. Other notable mentions are the Soviet Union, which dissolved in 1991, and the Ottoman Empire, which officially ended in 1922. Additionally, the Qing Dynasty in China, which fell in 1912, marks the end of imperial rule in China. These empires represent significant historical transitions into modern nation-states.