Disadvantages of Dependencies, Number 2
Another evil arising from the possession of dependencies is, that they tend to involve the dominant country in wars. A dependency may be situated at a great distance from the dominant country; or it may have a long and vulnerable frontier confining on the territories of other independant states. For these and other reasons it often happens that a dependency is difficult of defense, and that foreign governments are therefore tempted to invade it.
George Cornewell Lewis
Chapter VIII, Disadvantages Arising to the Dominant Country from the Possession of a Dependency