A state can be defined as a 'political community' which gathers under one leader and abide by a specfic set of rules and laws.
The early states as those seen in the Sumer, where city-states. Small in size, ruled by a king with the support of the local people and land lords.
The ruler also had a small army to maintain local order and to protect against foriegn invasions.
When the Nazi's fled and the Russians (I believe) invaded was a huge turning point giving jews and all others captured, hope and freedom.
The main purpose of the league of nations was to unify Europe and end conflicts within European countries.
Reagan Apologized to Thatcher for Grenada Invasion. ... In October 1983, Reagan ordered U.S. troops to invade Grenada, a Caribbean island nation, after he determined that its turbulent Marxist government posed a threat to the almost 1,000 Americans on the island (many of whom were students at a medical school).
Sorry if this is not helpful.