What secret weapon did the Confederate navy secretary call on to be built to defeat the Union naval blockade

I believe it was an early type of submarine made out of wood and was peddle powered and they used it to place an explosive on the underside of a union ship, sadly it sank on the first successful mission.

Explanation:

christopher columbus (1492–1504)

answer: ensure protection from communism

explanation:

the north atlantic treaty was largely dormant until the korean war initiated the establishment of nato to implement it, by means of an integrated military structure: this included the formation of supreme headquarters allied powers europe in 1951, which adopted the western union's military structures and plans.