These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
In the same vein, American tanks can make use of their machine guns (which moderately improve their effectiveness against anything including gunships) and High-Explosive Squash Head/Beyond Line of Sight ammunition which either completely destroys shields or lops off half of an enemy's health, and if it's a BLOS round, it's frequently beyond retaliation range.
Harsher in Hindsight: Intro video depicts Crimea as no longer part of Ukraine, either as independent or part of Russia. Come in 2014...
Player Punch: When you send your units into completely suicidal situations that there's no way they'll possibly escape from (which you're bound to have to do at least once), they tend to respond in sad, quiet voices with things like 'Wish us luck!' or 'We'll try our best, sir'. Anyone who doesn't feel like a complete and total bastard in that situation isn't human. Later in the game, every time a unit dies becomes a major Player Punch as well.