The history of colonialism in Central and West Asia, particularly the rivalry between Russia and Britain for influence and control in the region, is marked by strategic considerations and geopolitical maneuvering. Here are the key points regarding colonialism in Central and West Asia:

1. Rivalry Between Russia and Britain:
• The primary colonial rivalry in Central and West Asia was between the Russian Empire and the British Empire. Both powers sought to expand their influence in the region due to strategic and economic interests.
2. Russian Expansionism:
• Russia desired access to warm-water ports for trade and maritime influence. This expansionist policy posed a significant threat to British interests in the Indian subcontinent.
3. Crimean War and Expansion:
• After Russia's defeat in the Crimean War (1853-1856), in which it sought to expand its territory at the expense of the weakening Ottoman Empire, Russia turned its focus to Asia.
• In 1858, Russia forced China to cede a substantial territory north of the Amur River, effectively establishing the modern border between the Russian Far East and Manchuria (China).
4. Tibet and Afghanistan:
• To counter Russian influence in Tibet, Britain sent troops to Tibet in 1904, gaining control over Tibet's foreign policy.
• Following Russia's weakening after its defeat in the 1904-1905 Russo-Japanese War, an agreement was reached in 1907 between Russia and Britain, recognizing Tibet and Afghanistan as areas of British influence. This agreement allowed Britain to establish a buffer zone between India and Russia.
5. Persia (Iran):
• In Persia, under the 1907 agreement, Northern Iran was designated as Russia's sphere of influence, Southern Iran as Britain's sphere of influence, and Central Iran as a buffer zone with equal independence for both colonial powers.
6. Colonial Holdings in Asia:
• In Asia, Britain had control over territories including India, Ceylon (now Sri Lanka), Afghanistan, and Burma.
7. Expansion in the Far East:
• By 1871, most of the Far East was colonized, with Russia controlling approximately one-third of the region.
• In East Asia, China and Japan remained independent. Japan, after the Meiji Restoration in 1868, focused on industrialization and modernization, eventually becoming imperialist itself in the 1890s.
• China, however, became a significant target of imperialism during the 19th and early 20th centuries.

This colonial rivalry in Central and West Asia was driven by a complex interplay of strategic interests, territorial control, and the desire to establish influence over key areas in the region. It reflects the broader context of 19th-century imperial competition among major European powers.