Answer:
The Battle of Marathon was significant because it proved to the Greeks that the Persians were not 'invincible', which boosted the moral of the Greek troops, increasing their confidence to incline themselves in a common cause if the Persian attacked again (which they would)
Explanation:
The shortest Wars were: The Spanish-American War of 1898 lasted approximately 6 months; however some historians claim 8 months. Operation Desert Storm (January and Febuary 1991) lasted approximagtely 45 days. The "occupation" continued longer but the War was over in essentially 45 days.
