The thing is, they want a security guarantor that isn't Russia. Russia tends to dominate; the US tends to accelerate the economy. By having a US military presen

The thing is, they want a security guarantor that isn't Russia. Russia tends to dominate; the US tends to accelerate the economy. By having a US military presence, they are much more secure from domination by Russian interests (political, economic and security). This also means that western companies will feel more secure and invest further in their economies - something they all want because it brings rapid growth that tends to be better sustained.