Answer:
D
Explanation:
This ruling helped establish that only federal government could oversee commerce in domestic territory.
That is Padrão dos Descobrimentos
Padrão dos Descobrimentos is a monument on the northern bank of the Tagus River estuary, in the civil parish of Santa Maria de Belém, Lisbon. Located along the river where ships departed to explore and trade with India and the Orient, the monument celebrates the Portuguese Age of Discovery (or Age of Exploration) during the 15th and 16th centuries.
My first guess is because they were attacked by foreign invaders.
(but at the same time, both empires had split in their own way. The Han empire lost control and broke into different areas. The Roman Empire had become two parts, where the Western part was constantly attacked by Germanic tribes). Both sides were constantly attacked by invaders until there was no more land to take.
Answer: The role of the United States in the Vietnam War began after world war 2 and escalated into commitment during the Vietnam War from 1955 to 1973. After, US missions were carried out at a more consistent rate by sending out increasing amounts of military assistance from the US.