The US Military did have a role in guarding the border of the Republic of Korea (South Korea) and the Democratic Peoples Republic of Korea (North Korea) under the premises of the United Nations, but that mission is conducted solely by the ROK Army now. Iraq's borders are now being guarded by Iraqi personnel (perhaps with the presence of US advisors still, although these are just as likely to be contractors as they are military personnel). All in all, the US military isn't guarding any borders, although some National Guard units have been tasked to assist the Customs and Border Patrol.
Actually, elements of the Army National Guard and US Army and Air Force Reserves are being utilized to assist US Border Patrol agents in "protecting" US borders from illegal entries.
Custom's officials guard the borders of the US in respect to illegal goods.
border patrol or coast guard
coast guard
Yes. It was recently done the last 2 years.
On US property, like Navy ships or military bases
The US Military forces consists of: The US Marine Corps The US Army The US Navy The US Air Force, and The US Coast Guard
The Coast Guard is a branch of the US Military, so yes.
No, Coast Guard duties are by no means seasonal. The CG is a full branch of the US military.
In the US, the "Active" (full-time) military services are the US Army, US Marine Corps, US Navy, US Air Force and the US Coast Guard (in time of war). Each of the military services also has a Reserve Force. Each state has a reserve force of National Guard personnel, which can be called up to active duty by the President of the US.
The US Military consisted of: US Navy US Marine Corps US Army The US Coast Guard was also a part of the defense structure. The Air Force didn't exist until after World War 2.
No, there isn't. The Philippines are a sovereign country with their own military.