are all also regionalised and respectively divided into decentralized administrations of Greece, oblasts of Ukraine, regions of France, and countries of the United Kingdom (the United Kingdom also has a number of other types of devolved government: the Crown Dependencies and British Overseas Territories). There are also several federations in Europe, notably Germany, Austria and Belgium but also Bosnia and Herzegovina, Russia, Switzerland and debatably the Kingdom of the Netherlands (not to be confused with the Netherlands, which forms one of its constituent countries though overwhelmingly the most important one; this last also could be considered a regional state, according their provincial government duties). Americas There are only four regional states in the Americas: Bolivia, Chile, Colombia, and Peru. The reason is that in the Americas were on average much more recently created than those in Europe. Thus, federal structures are much more common and are found in the United States, Canada, Mexico, Brazil, Argentina, Venezuela, and formerly the West Indies Federation. Other countries such as Nicaragua, Saint Kitts and Nevis and Antigua and Barbuda have devolved power to certain regions but are not regionalized because the regional system does not expand across the whole nation. European territories Several European countries (namely the Netherlands, France and the United Kingdom) have overseas territories in the Caribbean that have devolved governments of their own. Asia People's Republic of China Communist-ruled Mainland China might be considered a regional state since significant levels of power are exercised by the provinces and autonomous regions as well as the special administrative regions. Provinces exercise such a degree of independent authority that some analysts claim that there exists a de facto federation in China because of striking differences in the nature of state policy between provinces, as exemplified by the competing Chongqing model and Guangdong model. Indonesia Indonesia is a regionalised unitary state. It was once a federal country for a brief period following its independence under the name United States of Indonesia, but that system was replaced by a unitary one in 1950. However, the country is divided into provinces, which exercise significant authority over local issues because of the large size of the country. Additionally, some regions such as Western New Guinea and Aceh have more autonomy because of their unique and often fractious relationship with the national government. Yogyakarta Sultanate is also a region of Indonesia that has a special relationship with the central