What was it like for vasco nunez balboa to prepare for the voyage

He was the first European to cross the Isthmus of Panama.

Explanation:

This led to the panama canal

The 16th-century Spanish conquistador and explorer Vasco Núñez de Balboa (1475-1519) helped establish the first stable settlement on the South American continent at Darién, on the coast of the Isthmus of Panama. In 1513, while leading an expedition in search of gold, he sighted the Pacific Ocean. Balboa claimed the ocean and all of its shores for Spain, opening the way for later Spanish exploration and conquest along the western coast of South America. Balboa’s achievement and ambition posed a threat to Pedro Arias Dávila, the Spanish governor of Darién, who falsely accused him of treason and had him executed in early 1519.

Explanation:i dont know if its what u looking for

the united states broke it's neutrality was the constant german sinking of trading vessels resulting in the loss of lives, one example would be the lusitania.