Afghanistan and Iraq come to mind. The US is also involved in a Drone War in Pakistan, and many military operations in the Horn of Africa.
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Can the Russian people do anything about their government that always starts wars?
Talk about a non sequitur.
Anyway, Will Wiley, you can witness Harry, Keith, and Jimmy here, who would be considered pretty liberal in the United States. Their immediate, knee-jerk reaction was to jump to defend the US's militarism. So I would say, there of *course* are many things the public could do. But there is almost zero political will for these things to stop.
Now, this is simply a characteristic of the polity at large. Remember, the US public has been heavily propagandized, starting with WW2, but most importantly, throughout the Cold War.
I don't think this will change until younger generations start supplanting the older ones.