<Tr> <Th_colspan="2"> Great Railroad Strike of 1877 </Th> </Tr> <Tr> <Td_colspan="2"> Blockade of engines at Martinsburg, West Virginia, 16 July 1877 </Td> </Tr> <Tr> <Th> Date </Th> <Td> July 14--September 4, 1877 </Td> </Tr> <Tr> <Th> Goals </Th> <Td> Wage increases </Td> </Tr>

Who started the first major labor strike in 1877