Ships.
Sea transportation was just right at that time as it can carry loots, spoils of war , enough fire power to conquer new colonies, and also food and necessities for sojourners ,seafaring soldiers and traders. Even exploration of unknown territories was also done with the help of sea transportation.
Currency . Even thought it had just 8 letters is the right answer.
Answer:
1901
Explanation:
The Spindletop oilfield, discovered on a salt dome formation south of Beaumont in eastern Jefferson County on January 10, 1901, marked the birth of the modern petroleum industry.