Sun Lasting
歷史鐵律: 成為冦, 敗為賊 or 成為賊, 敗為冦? - Zena LCH.
Sun Lasting According to the Treaty of Guadalupe-Hidalgo, ratified by both national congresses, Mexico ceded to the United States nearly all the territory now included in the states of New Mexico, Utah, Nevada, Arizona, California, Texas, and western Colorado for $15 million dollars.
It is equivalent to 1/3 of the current US territory.
Sun Lasting I am not a historian. The following messages might be opinionated.
Here is a piece of interesting historical info regarding annexed territories under a specific condition:
(Note, the US "purchased" 7 states for $15 million dollars in 1848 after the Mexican-American "War", which was quite different from doing a business with a Big Country called Russia for buying the Alaska "peacefully" in 1867 with $7.2 million dollars):
After the victory of Franco-Prussian war, German Empire in 1871 annexed Alsace and Lorraine of France. For historical and specific legal conditions, they were reversed to France following World War I. The territory has been referred to administratively as Alsace-Moselle.
Emile Zola “la debacle” published in 1892 has information regarding the war.
I am from Taipei, Taiwan. Though the following info is not much to do with Formosa, I added this episode of how the US rendered this indemnity:
The Boxer Indemnity Scholarship (庚子賠款獎學金) - The 8-Nation Alliance (Austria-Hungary, France, Germany, Italy, Japan, Russia, Britain and the United States) quelled the peasant-based Boxer rebellion in 1899 of the last dynasty of the dying Qing (Ching) Empire which was overburdened with paying 1, 180,000,000 troy ounces silver as war indemnity to the 8 "intruding" countries.
The US, being one of the "involving" countries, despite the fierce controversies over returning the excess payment, President Theodore Roosevelt's administration decided to establish the Boxer Indemnity Scholarship Program in 1908 to educate young generation of the defeated country.
Being great can be the hardest (or dangerous?) thing to do while neo/imperialism is trendy in the past, present, and to the future to come. Time tells which regime will take on the next business...
Sun Lasting Does any friend have info regarding "Unequal Treaties" in addition to those of Asia ? https://www.thoughtco.com/unequal-treaties-195456
Does any friend have info regarding "Unequal Treaties" in addition to those of Asia ? https://www.thoughtco.com/unequal-treaties-195456
Note,
Most of the treaties considered unequal by the victimized were
abrogated during the Second Sino-Japanese War, which started in 1937 and
merged into the larger context of World War II.
The
United States Congress ended American extraterritoriality in December
1943. Significant examples did outlast World War II: treaties regarding
Hong Kong remained in place until Hong Kong's 1997 handover, and in
1969, to improve Sino-Russian relations, China reconfirmed the 1859
Treaty of Aigun.

thoughtco.com
Unequal Treaties in Early Modern Asian History
Sun Lasting Just found an article: "What Happened to Unequal Treaties?"
https://eprints.soas.ac.uk/17312/1/v74n3_splitsection3.pdf
The author slightly mentioned (based on the Asian case):
" Whether one thinks in terms of non-reciprocal human rights
agreements, or agreements to promote free trade or the protection of foreign investments, the parallels with 19th Century extraterritorial regimes predicated upon maintaining the ‘open door’, insulating traders and investors from the arbitrary excesses of local law, and promoting humanitarian ideals appear all too obvious.
There is, at the very least, a question to answer here – and one which is imprinted, as much as anything else, in international lawyers’
unwillingness to engage effectively with the problem of inequality."
What about most "Treaties" made between Native Americans and their Counterpart...or just mere "contracts" of all the slave trade "agreements"?