Don't get it... 

"planned to spend three months with the Parachute Regiment at Falklands, and stayed there for 3 months before returning back to England, where they parachuted into the sea to secure the beach heads whilst the British pulled out"

Into which sea did he parachute?

Which beach heads was he securing?

From where were the British pulling out?

Is this tied up with the Aden quotes I've read? They seem to have all gone. "At Falklands"? Do they mean the Falkland Islands?

The passage doesn't make much sense to me.