Innovations in technology radically change military budget allocation from focusing on soldiers development into budget plan that focus on development of weapons and war vehicles.
Explanation:
In the late nineteenth century, industrialized nations able to produce high quality weapons in large quantity due to the industrial revolution. Since those weapons able to eliminate enemies in larger numbers, all countries start to see that focusing their budget for those weapons were far more beneficial.
Sparta won the Peloponnesian War because the Athenians were trapped inside their own walls and there was no cleanliness. A plague struck the city, and within two years one-third of the Athenian population had died.
City planners adopted railroad technology in the Industrial Age to help out commuters. Since a lot of factories were not located close to homes, people took the train to get to work as their way of transportation.