And today Russia has no American troops on its border? The Russians themselves are to blame. Not only do they attack their neighbors, but also constantly provoke the West. For this reason, it turns out everything is just the opposite.
Russia has American troops on its borders, especially in Finland, Estonia, Latvia, and Lithuania. But Russia has not invaded any of these nations. And regarding Ukraine, there was no Russian invasion. There is an ongoing civil war between the Westerners and the Easterners, and Russia is not directly involved.