Yes, but not in the context which the Alex Jones types make it out to be. For example, NORAD is a joint US-Canadian operation, thus there are Canadian military personnel stationed at Schriever Air Force Base. Some countries use their military to provide security for their overseas embassies and consulates, so those troops are stationed within the US, although technically they're stationed on the soil of their home country, since embassies are considered part of the country which occupies them, rather than the country hosting them.
There are approximately 68,000 US Troops stationed in Germany.
About 4,590 are stationed in Afghanistan.
zero
Poland has 2,630 troops stationed in Afghanistan.
South Korea has 250 troops stationed in Afghanistan.
Over 800000 killing innocent Kashmiris there
By the end of 1965, the United States had 184,300 troops in Vietnam.
there are no British Soldiers stationed in the US because that is an act of war and the US is obviously not fighting Great Britain.
The Union had around 95,000 troops and Confederates had 75,000 troops.
Portugal has 250 men stationed in Afghanistan.
Since the end of the Second World War to the present day.
After the Seven Years' War, approximately 10,000 British troops were stationed in North America. Their presence was intended to help maintain order and oversee the newly acquired territories. This military presence also aimed to enforce the British government's policies and manage relations with Native American tribes in the region.