<Table> <Tr> <Th_colspan="2"> First U.S. Volunteer Cavalry Regiment </Th> </Tr> <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Active </Th> <Td> 1898 </Td> </Tr> <Tr> <Th> Country </Th> <Td> United States of America </Td> </Tr> <Tr> <Th> Branch </Th> <Td> United States Army </Td> </Tr> <Tr> <Th> Type </Th> <Td> Cavalry </Td> </Tr> <Tr> <Th> Nickname (s) </Th> <Td> Rough Riders </Td> </Tr> <Tr> <Th> Engagements </Th> <Td> <P> Spanish--American War </P> <Ul> <Li> Battle of Las Guasimas </Li> <Li> Battle of San Juan Hill </Li> <Li> Siege of Santiago </Li> </Ul> </Td> </Tr> <Tr> <Th_colspan="2"> Commanders </Th> </Tr> <Tr> <Th> Notable commanders </Th> <Td> Leonard Wood Theodore Roosevelt </Td> </Tr> </Table> <Tr> <Th_colspan="2"> First U.S. Volunteer Cavalry Regiment </Th> </Tr>

Who were the two leaders of the rough riders