The French and Indian War was the longest US war before 1850.The longest US war in history was the Vietnam War.
the Mexican War
morals, politics, economy, and legal issues
The Missouri Compromise of 1850 was made a moot compromise with the introduction of the Kansas Nebraska Act of 1854. Neither pieces of legislation can be demonstrated as a cause of the US Civil War. And, both laws were deemed unconstitutional by the US Supreme Court in the Dredd Scott case of 1857.
The siege of Petersburg lasted nine months.
There was no US Postal Service in 1850.
The war on drugs
Zachary Taylor died on 9 July 1850 long before the US Civil War.
The longest war the United States ever entered was the Vietnam War.
Viet Nam 1961-1975
The US has been fighting in Afghanistan longer it was fighting in Vietnam. It is the longest war in US history.
Vietnam
the Mexican War
In the 18th, 19th, and 20th centuries, it was the Vietnam War.
Utah became a territory in 1850 folloewing the Mexican-American War
morals, politics, economy, and legal issues
The Missouri Compromise of 1850 was made a moot compromise with the introduction of the Kansas Nebraska Act of 1854. Neither pieces of legislation can be demonstrated as a cause of the US Civil War. And, both laws were deemed unconstitutional by the US Supreme Court in the Dredd Scott case of 1857.
After the Mexican American War (1846-1848). On September 9, 1850, as part of the Compromise of 1850, California was admitted to the United States undivided as a free state, denying the expansion of slavery to the Pacific Coast.