Japan
1832: Mexican-American war begins over Texas
1836: The treaty of Santa Fe, war ends and Mexice cede it's northen territories to the United sates (OTL Guadalupe Hidalgo)
1842: William of the Netherlands urges Japan to open the country, the Shogun rejects
1844: Four US war ships arrive at Yokohama demanding that Japan end the isolation. Japan rejects. The port is bombarded, but the Japanese refuse to negotiate
1846: The American-Dutch Expedition is launched, the city of Nagasaki is occupied but the Shogun rallies his armies on Honshu
1847: American and Dutch forces land near Yokohama, Kochi, Hyogo and Satsuma
1848: Kyoto and Edo captured, Japan officially surrender, the shogun commits suicide.
1851: The last Japanese daimyos surrender. Townsend Harris, the president of the Dutch-American Company for Japanese Commerce, is crowned shogun of Japan.
1853: Japan becomes an official U.S. protectorate. Trade with the US increases and many american capitalists own factories in Japan.
1870: Japanese urbanization and BNP surpasses that of the US.
1872: The Japanese Revolution begins with the Riot of Kanazawa. Various warlords claiming ancestry to old clans rise in different parts of the country. The US troops in country are thrown out.
1874: In central and western Japan the Shinto-Nationalistic "Imperial Army" is formed. In southern and eastern Japan the Communist People's Democratic Front of Japan is formed while northen Japan is divided between socialists, conservative warlords and democrats.
1877: With british support the Democratic Part of Japan captures Kyoto and kill the Emperor
1879: The Democratic Party of Japan and the Communist Peoples Democratic Front of Japan agrees to a cease fire. The most of the smaller warlords are defeated.
1881: British soldiers invade communist-held Kyushu. The US is outraged and after threats of an invasion of Canada, the British leaves Kyushu, but the Democratic Party of Japan sees it's chance and invade the weakened communists.
1882: The Democratic Republic of Japan is esthablished.
1886: Russia invade Korea, Japan intervene on Korea's side and the Russo-Japanese war begins
1889: Russia is defeated. Korea, Sakhalin and the Kurils are annexed by Japan
1892: The Sino-Japanese war begin. Japan occupy the Ryukyus and Taiwan and invade mainland China
1896: Manchuria, Jiangsu and coastal Fujian are ceded to Japan. Japan buys the Philippines from the US
1898: The Chinese revolution. The Japan-Faction take over in a coup and China becomes Japans satelite nation
1899: World War One begins: Japan, the UK, France, the Ottomans and Austria-Hungary vs. Germany, Holland, Italy, Russia and the US