1. Pakistan gained independence from British rule in 1947 and adopted a parliamentary system of government. It was initially divided into two wings but East Pakistan later became the independent nation of Bangladesh after a war of independence.
2. The country has experienced periods of democratic civilian rule as well as martial law under military dictatorships. The current constitution was ratified in 1973 and establishes a federal parliamentary republic.
3. The government is composed of three branches - the executive branch led by the Prime Minister, the legislative branch made up of the parliament, and an independent judiciary headed by the Supreme Court.