Sir John Chandos illustrates an English willingness to reward effective command below the highest nobility, providing a limited route for talent to rise. Such mobility can reduce revolutionary pressure and keep capable people invested in the state. Spain's encounters with the Ottoman Empire, the Habsburg-Ottoman wars, and later French or Prussian ambitions show how continental states could find strategic prizes across neighboring borders. Island populations accustomed to ships could instead treat distant voyages as an extension of ordinary movement. Geography thus helps explain why similar ambitions produced adjoining land empires in one setting and overseas expansion in another.
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Social mobility and geography direct expansion
Who can rise to command and where a population sees opportunity affect military recruitment, stability, and the direction of expansion.