<Tr> <Th> Liechtenstein </Th> <Td> Abolished its army in 1868 because it was deemed too costly . An army is only permitted in times of war, but that situation has never occurred . However, Liechtenstein maintains a police force and a SWAT team, equipped with small arms to carry out internal security duties . Defense assistance is provided by Austria and Switzerland under an informal agreement among the three countries . </Td> <Td> </Td> </Tr> <Tr> <Th> Marshall Islands </Th> <Td> Since the country's foundation the only forces permitted are the police, which includes a Maritime Surveillance Unit for internal security . The Maritime Surveillance Unit is equipped with small arms, and maintains one Pacific - class patrol boat, the Lomor . Under the Compact of Free Association, defense is the responsibility of the United States . </Td> <Td> </Td> </Tr> <Tr> <Th> Federated States of Micronesia </Th> <Td> Since the country's foundation no military has been formed . The only forces permitted are the police, which maintain a Maritime Surveillance Unit for internal security . The Maritime Surveillance is equipped with small arms, and maintains one Pacific - class patrol boat, the Independence . Defense is the responsibility of the United States under the Compact of Free Association . </Td> <Td> </Td> </Tr> <Tr> <Th> Nauru </Th> <Td> Australia is responsible for Nauru's defense under an informal agreement between the two countries . However, there is a relatively large armed police force, and an auxiliary police force for internal security . </Td> <Td> </Td> </Tr>

Who has the smallest army in the world