What developmental concept had its beginnings during The Spanish American War?

The correct answer is that the concept of "The Seizure of Advance Naval Bases" had its beginnings during the Spanish-American War. This conflict highlighted the necessity for the United States to establish strategic bases to support military operations abroad, particularly in a maritime context.

During the war, the U.S. Navy recognized that having ports and bases close to active conflict zones would be crucial for sustaining military presence and logistics. The ability to quickly seize and secure these bases allowed for the deployment of forces and resources, significantly impacting the effectiveness of naval operations.

This concept laid the groundwork for future military doctrine, particularly in how the U.S. approaches both naval and amphibious operations, emphasizing the importance of a forward-deployed naval presence in strategic locations. The Spanish-American War was therefore pivotal in shaping the operational strategies that would define amphibious warfare and advanced naval tactics in subsequent conflicts.