Final answer:
Economic hardship following the American Revolution, such as heavy taxes and unmet promises of payment for military service, led to Shays's Rebellion among Massachusetts farmers.
Step-by-step explanation:
The success of the American Revolution resulted in unforeseen consequences for many of the citizens of Massachusetts. After the war, the state faced heavy debts and the government decided to impose an onerous tax burden to repay its debts. This put a severe strain on local subsistence farmers, many of whom had been away fighting and had not managed to earn enough to pay such taxes. The impoverishment faced by these farmers was exacerbated by the fact that the Confederation Congress had been unable to pay them for their military service, resulting in a lack of the promised compensation. This series of economic pressures led to growing dissatisfaction and eventually culminated in Shays's Rebellion, a significant uprising led by disgruntled farmers in western Massachusetts.