Heard Island and McDonald Islands:
defense is the responsibility of
Australia
Holy See (Vatican City): defense is the responsibility of Italy; Swiss Papal Guards are posted at entrances to the Vatican City to provide security and protect the Pope
Hong Kong:
defense is the responsibility of China
Howland Island:
defense is the responsibility of the US; visited
annually by the US Coast Guard
Iceland:
defense is provided by the US-manned Icelandic Defense
Force (IDF) headquartered at Keflavik
Jan Mayen:
defense is the responsibility of Norway
Jarvis Island:
defense is the responsibility of the US; visited
annually by the US Coast Guard
Jersey:
defense is the responsibility of the UK
Johnston Atoll:
defense is the responsibility of the US
Juan de Nova Island:
defense is the responsibility of France