Becoming A World Power (8 h 10 m, 30 ago 1872 ano – 15 h 39 m, 22 jul 1917 ano)
Descrição:
 taking hold of foreign countries by using military. Many people helped push this by writing their opinions or putting the blame on the foreign countries they want to take hold of. (Spanish and Filipino- American wars, Alfred T. Mahan, Senator Albert Beveridge, Yellow Journalism) 
Adicionado na linha do tempo:
Data:
8 h 10 m, 30 ago 1872 ano
15 h 39 m, 22 jul 1917 ano
 ~ 44 years