heard one story about a mixed raid of British SAS , American SEALS and Ghurkas.
The plan was to fly the group in low at 800 feet under cover of darkness into a heavily forrested area drop off the troops who would then trek 20 miles through the jungle and attack the heavily defended enemy post.

After the briefing the SAS said yes they were up for and ready to go.

The SEALS thought for a moment and said they to were ready.

The Ghurkas said they would have to think about it.

The commanding officer said whats up you are well trained well equiped. You have fought in jungles. And the large force of enemy you you meet will be surprised.
No it wasnt that they replied.

Was it the trek at night through the jungle.

No it was it that.

Was it flying low in a mountainous area at night.

No it wasnt that.

Well what is asked the commander you are all experienced and have parachuted into jungles before.

OH said the Ghurkas We get parachutes? Thats ok then.