Answer:
The allusions reinforce the suffering caused by the combat between two nations.
Step-by-step explanation:
Allusions are figures of speech that allow a text to quote and refer to people, places or other artistic and literary works.
In the text presented in the question above, we can see the allusion to two places, the USA and Saigon (located in Vietnam). The allusion reinforces the suffering of people in Saigon, caused by the war and armed conflicts between Vietnam and the USA. These allusions reinforce the suffering and horrors that a war causes, because a country considers itself worthy of inflicting that suffering on a nation, regardless of the people and the pain caused.