There's a lot of oversimplification. But the US embargo on Japan in 1940 led directly to the attack on Pearl Harbor.
The US embargoed all oil to Japan. Japan calculated it had less than 2 years worth of oil before it ran out, so it needed to capture the Dutch East Indies (modern day Indonesia, more or less) because they were a major source of oil. The American puppet state of the Philippines was between Japan and the Dutch East Indies, so they had to deal with that somehow. Their decision was to preemptively attack Pearl Harbor and hope that they could consolidate their gains in the Pacific by the time the US was able to counter-attack.
Japan's actions in WWII weren't directly about tariffs, but they were about spheres of influence, like the Greater East-Asia Co-Prosperity Sphere.
A lot of Trump's posturing seems to be about bringing back these spheres of influence. The US wants to control North America, taking over Greenland and Canada, and leave Europe to become part of the Russian sphere.
As a general rule, people with US citizenship working in most other countries still have to file US taxes, but they end up owing nothing. There's a big exemption for wages earned in other countries, so unless you're making a lot of money and simultaneously living in a place with very low taxes, your payment will be $0. This sometimes affects say bankers who move to Switzerland where they make a lot of money and don't pay much in taxes. But, for most jurisdictions (including Canada) the taxes are more-or-less on par with the US or higher so you don't end up owing anything.