Prepare to rejoice in National Submarine Day on April 11! This occasion commemorates the creation of the submarine, a pivotal asset in naval warfare throughout history. Dutch inventor Cornelius van Drebbel constructed the first submarine in 1620, embarking on submerged journeys along the Thames River with his crew. Since then, submarines have evolved into a crucial component of contemporary military strategy, renowned for their stealth capabilities and capacity to navigate underwater for extended durations.