There isn't a clear definition of what counts as part of a country. For this purpose, it's about access to intelligence. By that standard, Britain is part of Am

There isn't a clear definition of what counts as part of a country. For this purpose, it's about access to intelligence. By that standard, Britain is part of America too because they share intelligence. If it's decided by the country that claims it, then many disputed regions belong to more than one country. If it's decided by international agreement, then what happens when they don't agree? Like Taiwan and other disputed regions. What about Puerto Rico? Is that part of the US? If it's about control of the government and military, was Iraq part of the US when it was occupied?