# Wars of Expediency.
The invasion of Silesia by Frederick II., and the war of the Spanish Succession, were wars of expediency.
There are two kinds of wars of expediency:
- first, where a powerful state undertakes to acquire natural boundaries for commercial and political reasons;
- secondly, to lessen the power of a dangerous rival or to prevent his aggrandizement.
These last are wars of intervention; for a state will rarely singly attack a dangerous rival: it will endeavor to form a coalition for that purpose.
These views belong rather to statesmanship or diplomacy than to war.