In Germany, historically the strategic issue was anti-communism, but now it serves as a military logistics hub; in Iraq, it's about trade in oil in dollars and access to Iraqi oil fields for US companies.
The UK is more complex and more total, ranging from support in the security council, to access to markets for US goods and services, to stationing of US troops and hardware. Most of our economy is geared up for the benefit of US investment funds.
Any government, whether it be Germany, Iraq or the UK, which tries to alter any of these fundamentals will quickly find out the extent to which their land has been grabbed.
Whether troop presence is viewed as occupation or not in each of the >50 [1] countries currently "hosting" troops is very much a matter of personal perspective, the fringeness of which will vary from country to country.
I don't believe that it really changes the fact that yes, US troops occupy the UK, Germany and Iraq, and many more. The most substantial deployments, e.g., Germany, Japan, South Korea, and until recently Iraq and Afghanistan, were very much the product of invasions. At the time of those invasions, many of those on the receiving end would have very much felt on the receiving end of a land grab. It's just their grandchildren have been conditioned to view this state of affairs as natural.
The general pattern is "bomb the bejesus" [2] out of a country. Plant base. Install a friendly government and ensure a favourable operating environment for US interests. The UK is an exception in that it wasn't bombed by the US, but the upshot is the same. We're a wholely-owned subsidiary of corporate America, and a giant aircraft carrier on the other side of the Atlantic -- as the US's latest adventure in Iran has clearly demonstrated.
You may quibble over the "land" in land-grab, but the strategic bits (e.g., oil fields, bases) are very much owned, and the territory as a whole controlled by pliant governments.
[^1]: https://en.wikipedia.org/wiki/List_of_countries_with_oversea...
[^2]: Kissenger, 1972
Nations (and people) exist in an ecosystem, and so will always behave accordingly, and always in their own interests. There are some emergent properties of ecosystems, one of which is that optimal behaviour is to acquire the maximum you are physically capable of defending, not the minimum that you need to survive.
It's perfectly reasonable for the US, the big fish in the pond, to leverage its advantages accordingly, and to the maximum. It would be a disservice to the US people if it did not. Smaller fish should indeed be glad that the big fish is as placid and strategically (rather than ideologically) motivated as it is, given the historically experienced alternatives.