Misplaced clause 

In the sentence ending "precipitating the Second Sino-Japanese War (1937–1945), after which the United States placed an oil embargo on Japan," the final clause is misplaced. The embargo was in response to the invasions, not the subsequent war. The sentence is not likely to be misunderstood but it has a jarring effect. Rewrite by breaking out a separate sentence: "In response to the invasion, the United States..."