Answer:
The cartoon is clearly against the spread of American Imperialism.
Explanation:
It is highlighting the fact that on the same year of the 128th anniversary of the United States, the United States has become a country that attempts to subjugate other countries in an imperalist fashion, something against which the United States fought during the American Revolution (which was fought against the British Empire).
In other words, the author of the cartoon probably feels that by engaging in Imperialism, the United States is betraying its own values.
