Multiple reasons. Firstly, Britain (a world-wide power) was setting humongous taxes on imported and exported goods. (As in the 'Tea Party' the Americans rebelled by throwing the tea into the sea). The colonies were irritated by this whole control, and wanted more power and say in what taxes were put on them.
According to Washington, to stop a rebellion, you need a strong armed force to crush it. During his time, the US is just untied. Many Americans doesn't trust the government. To show power and authority, Washington believes that when a rebellion is formed, you need to force it to stop. The federal government is the power to check these rebellions. If the government don't, who would protect the citizens and their human rights?
How long does a federal judge stay on the bench? According to the U.S. Constitution, most judges of Article III courts enjoy life tenure (the Constitution says they may hold office “during good Behaviour”). As explained below, they may be removed from office by Congress, but that is very rare.
Congo River, formerly Zaire River, river in west-central Africa. With a length of 2,900 miles (4,700 km), it is the continent's second longest river, after the Nile.