The presence of Anglos was the similarity--Anglo (white) people in the regions held economic interests leading to the revolts against the leadership and a demand for annexation.
After the Mexican Revolution, the whites living in Texas, who also were the main ranchers of the region, asked the US to assist in a revolution against Mexico to become independent. The independent nation requested the US to annex the state so the whites could regain connection to the US. During the Mexican-American War, the region of California also staged a revolt against Mexico and declared themselves a free republic called the Bear Flag Republic. The white settlers in the region assisted the US with the war and after became part of US territory. This is the same as Hawaii, white land owners and farmers asked the US to assist in a revolt and eventual annexation of the islands. This put whites in power in Hawaii to control the territory.
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They had modern weapons which made them strong
The National Government could not force the states to obey it's laws.
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Techological improvements allowed for mass printing of newspapers and books in the 19th and 20th centuries. This has had an economic, commercial and social impact. It was possible to reach thousands or even millions of people with a single edition; it was possible now to reach a massive audience who did not have higher education, but wanted to read news and have some form of entertainment. People have always wanted to know about shocking events, disasters, tragedies, violent crimes and the juicy details of the romantic life of those famous and powerful. There is an old phrase of American journalism: "Dog bites man, that´s not news. Man bites dog, that´s news." So , newspapers for a massive audience were set up and exploited stories about violence, crime and sex. That´s the advent of "yellow journalism" in the modern world. Besides, having a high number of readers or subscribers assured profits for newspaper owners, because the larger the audience, the larger the advertising revenues. This logic continues to be true today.
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