<Table> <Tr> <Th_colspan="2"> Shays' Rebellion </Th> </Tr> <Tr> <Td_colspan="2"> Protesters watching a debtor in a scuffle with a tax collector by the courthouse at Springfield, Massachusetts </Td> </Tr> <Tr> <Th> Date </Th> <Td> August 29, 1786--June 1787 </Td> </Tr> <Tr> <Th> Location </Th> <Td> Western Massachusetts </Td> </Tr> <Tr> <Th> Caused by </Th> <Td> <Ul> <Li> Economic policy </Li> <Li> Aggressive tax and debt collection </Li> <Li> Political corruption and cronyism </Li> </Ul> </Td> </Tr> <Tr> <Th> Goals </Th> <Td> Reform of state government, later its overthrow </Td> </Tr> <Tr> <Th> Methods </Th> <Td> Direct action to close courts, then military organization in attempt to capture the U.S. arsenal at the Springfield Armory </Td> </Tr> <Tr> <Th> Resulted in </Th> <Td> Rebellion crushed, and problems of Federal authority linked to the Articles of Confederation spur U.S. Constitutional Convention </Td> </Tr> <Tr> <Th_colspan="2"> Parties to the civil conflict </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> Anti-government protesters </Td> <Td> <P> United States </P> <Ul> <Li> Massachusetts State militia </Li> <Li> Privately - funded local militia </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Lead figures </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> <Ul> <Li> Daniel Shays </Li> <Li> Luke Day </Li> <Li> Eli Parsons </Li> <Li> Job Shattuck </Li> </Ul> </Td> <Td> <Ul> <Li> James Bowdoin </Li> <Li> Benjamin Lincoln </Li> <Li> William Shepard </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Number </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> 4,000 + (largest force 1,500) </Td> <Td> 4,000 + (largest force 3,000) </Td> </Tr> </Table> </Td> </Tr> <Tr> <Th_colspan="2"> Casualties </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Td> <Ul> <Li> 6 killed </Li> <Li> Dozens wounded </Li> <Li> Many arrested </Li> <Li> 2 hanged afterward </Li> </Ul> </Td> <Td> <Ul> <Li> 3 killed </Li> <Li> Dozens wounded </Li> </Ul> </Td> </Tr> </Table> </Td> </Tr> </Table> <Tr> <Th_colspan="2"> Shays' Rebellion </Th> </Tr>

What was the cause of shays rebellion in massachusetts