During Grenada, 4 SEAL Team 6 SEALs drowned.
An event that was caused entirely by the bumbling incompetence of dumbasses that had no idea as to what conditions the guys were facing.
And, because of the "political" aspect...probably do not care to this day.
Timelines and execution times were moved back and forth, mostly without any viable HUMINT or SIGINT input.
The upper level "planners" did not even consult a tide chart or weather map.
Additionally, the DZ coordinates furnished to the transport pilots were in question, causing one of the transports to completely miss the DZ.
The entire fiasco was absolutely preventable and had NOTHING to do with the competence and abilities of the Team.
As a result of the incident, despite attempts at obfuscation and downright lying that reached all the way to the SECDEF, much of the procedures and intel analysis was given back to the Teams and was conducted wholly in-house (for the most part) by the Teams themselves in most of their future operations.
A fact that pissed off much of the desk drivers, all of whom had probably never suffered much more than a paper cut or a staple scratch.
The future Milleys and Austins, etc, of the later military hierarchy.