Depending on the time, it could be the Phoenicians ( I think this is the best answer; this is what they're known for best) or later in time, the Romans (but they had colonies also elsewhere).
Explanation:
Cant be A because On May 13, 1846 the United States Congress passed An Act providing for the Prosecution of the existing War between the United States and the Republic of Mexico
Can't be B because Mexico did declared a defensive war against the U.S. on April 23, 1846.It would defend territories under the attack but would not take the offensive.
Can't be C because On April 25, 1846, a 2,000-strong Mexican cavalry detachment attacked a 70-man U.S. patrol that had been sent into the contested territory north of the Rio Grande and south of the Nueces River. In the Thornton Affair, the Mexican cavalry routed the patrol, killing 16 American soldiers.
Is D because can't find any information on this and the rest are true.
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Explanation:
answer A hope this helps :)
Answer:
C. Trench warfare
Explanation:
A's incorrect as alliances have existed for thousands of years
B's incorrect as an infantry charge's greatest weakness is the machine gun for obvious reasons
D's incorrect as both sides had machine guns, and was not the reason for victory.
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This leaves C, which makes sense as troops would be forced to hide on lower ground due to the deadliness of machine guns
