The decline of Buddhism has been attributed to various factors, especially the regionalisation of India after the end of the Gupta Empire (320–650 CE), which led to the loss of patronage and donations as Indian dynasties turned to the services of Hindu Brahmins.
Eradicated the Missouri Compromise and started popular sovereignty
Herbert Clark Hoover's early careers helped set him up for his future presidency because he gained useful experience that ended up playing a major role in his future job as the 31st president. During the Great Depression, he did his best to help rewire the United States into a more progressive era.
They used the Army to investigate.