Invading and annexing isn't some weird thing no one usually does.
Taiwan is the product of a recent civil war.
Not a single one in the last 100 years
Taiwan (Republic of China) is an independent country and never was part of the PROC.
Here is a ChatGPT response to you because I wont bother with kneejerk responses:
In the last 100 years, the United States has been involved in several military invasions and interventions in various countries. Some notable examples include:
Mexico (1914) - U.S. forces occupied Veracruz.
Haiti (1915-1934) - U.S. Marines occupied Haiti to stabilize the country.
Dominican Republic (1916-1924) - U.S. intervention to restore order and protect American interests.
Korea (1950-1953) - U.S. involvement in the Korean War, supporting South Korea against North Korea.
Vietnam (1955-1975) - Extensive military involvement in the Vietnam War.
Grenada (1983) - U.S. invasion to overthrow the government and restore order.
Panama (1989) - Operation Just Cause to depose Manuel Noriega.
Iraq (2003) - Invasion to overthrow Saddam Hussein, followed by a prolonged military presence.
Afghanistan (2001-2021) - Response to the 9/11 attacks, targeting the Taliban and al-Qaeda.
This list highlights significant military actions but is not exhaustive, as the U.S. has also conducted numerous smaller operations, interventions, and covert actions in various countries over the years.