in 1988 Indonesia threatened to close the Lombok Straights (the only place we can get our subs through without them surfacing or driving a long long way around.
I was US Navy but assigned to the Forward spotting officer for the 13th Marine Expeditionary Unit. I was launched form the USS New Orleans at 4 am in a CH 53E. The forward spotting officer, a Marine Gunnery Sargent, 6 other marines and myself. We were the forward deployed unit and I was the Tactical Environment specialist (Then an AG3, left as an AG2 (AW)).
We did all the beach work up (surf height, Pressure altitude, Density altitude, laser and radar predictions) and sent the information back to the ship using the radioman's radio plugged into my very heavy "portable" computer.
Then the local militia showed up. The had some small arms, and we had M249 Machine guns. The firefight lasted a short time, we suffered zero casualties, they got their asses kicked. Unfortunately for them, and for my psyche even to this day, most of the people in the group we encountered were young and mostly untrained. (like 13 or 14 years old kind of young) So that part sucked, I was "that geeky weather kid" as the marines called me, and not much of a fighter but I used my M14 as I was (some what) trained to do....
They left the straight open for shipping traffic and we were replaced by the Australian Army to "watch over" the straights.
So, yup, we keep an eye on that region. It is both strategic in that it controls shipping, and there is a strong communist (New People's Army) and Violent Muslim groups (Moro Islamic Liberation Front) presence there. Australia would love our help in making sure nothing major happens in that region.

