Buddhism Arises in the Ganges Plain. India, 500 BCE to 400 BCE, Arrived. Source, History of Indian Buddhism: From the Origins to the Saka Era.
Buddhism Reaches Sri Lanka. Sri Lanka, 247 BCE, Established. Source, History of Indian Buddhism: From the Origins to the Saka Era.
Buddhism Reaches China. China, 50 to 150, Arrived. Source, The Buddhist Conquest of China: The Spread and Adaptation of Buddhism in Early Medieval China.
Buddhism Reaches Central Asia. Central Asia, 100 to 250, Established. Source, Buddhism in Central Asia (Wikipedia).
Buddhism Reaches Vietnam. Vietnam, 168 to 189, Arrived. Source, Buddhism in Vietnam (Wikipedia).
Buddhism Reaches Korea. Korea, 372, Arrived. Source, Korean Buddhism (Wikipedia).
Buddhism Reaches Japan. Japan, 538, Arrived. Source, Buddhism in Japan (Wikipedia).
Buddhism Reaches Tibet. Tibet, 630 to 791, Established. Source, Tibet: A History.
Langdarma's Reign Ends Imperial Patronage of Buddhism in Tibet. Tibet, 841 to 842, Suppressed. Source, Langdarma (Wikipedia).
Atisha's Arrival Opens Tibet's Second Diffusion. Tibet, 1042 to 1045, Revived. Source, Atisha (Wikipedia).
Theravada Buddhism Consolidates in Southeast Asia. Southeast Asia, 1044 to 1300, Dominant. Source, Theravada Buddhism: A Social History from Ancient Benares to Modern Colombo.
Buddhism Nearly Disappears From India. India, 1193 to 1300, Extinct. Source, Nalanda Mahavihara (Wikipedia).
The Mongol Empire Adopts Buddhism Under Sakya Patronage. Mongolia, 1260 to 1271, Established. Source, Buddhism in Mongolia (Wikipedia).
Buddhism Becomes Dominant in Mongolia Through the Second Conversion. Mongolia, 1578 to 1937, Dominant. Source, Buddhism in Mongolia (Wikipedia).
The Kalmyks Migrate to the Volga Steppe and Establish Buddhism in Europe. Russia, 1630, Arrived. Source, Kalmyk Khanate (Wikipedia).
Empress Elizabeth's Decree Recognizes Buddhism Among the Buryats. Russia, 1741, Established. Source, Buddhism in Russia.
Buddhism Reaches the United States. United States, 1853 to 1893, Arrived. Source, Buddhism in the United States (Wikipedia).
The Meiji Restoration's Haibutsu Kishaku Suppresses Buddhism In Japan. Japan, 1868 to 1874, Suppressed. Source, Haibutsu Kishaku (Wikipedia).
Olcott and Dharmapala Revive Buddhism in Sri Lanka Under Colonial Rule. Sri Lanka, 1880 to 1891, Revived. Source, Henry Steel Olcott (Wikipedia).
Stalinist Purges Destroy Buddhism in Mongolia. Mongolia, 1937 to 1939, Extinct. Source, Stalinist Repressions in Mongolia (Wikipedia).
This spoken summary covers the first 20 of 25 recorded events, in date order. The remaining 5 events and full source detail for every event are in the Full Chronology list below.