In general, World War II played a role in the eventual decolonization of Southeast Asia because the Japanese lost the war and were forced to give up many of their holdings.
The formation and development of political parties are usually a result of the decision of a group of people often referred to as CAUCUS who come together to form a political party.
This group of people or CAUCUS shares similar ideas or causes in which they are considered to favor greatly or ardent PARTISANs of such principles or political belief.