As I said, it was MY misunderstanding.
As for "Black hawk down" / the battle of Mogadishu, The faults lie at a much higher level than training, The very Mission was flawed by personal prejudices of the UN leadership. The Marines who served there prior to UN involvement had no where NEAR the problems incited by the UN.
Commenting on differences between Army training and Marine training, (I also spent a few years in the Guard) The mind set is different.
The Army has traditionally trained and geared itself for large scale conventional warfare against more or less equivalent conventional / State armies, whether that means Washington's Regiments against Cornwallis' regiments,
Patton's divisions against the German divisions, or NATO standing against the threat of a Warsaw Pact invasion of Europe.
The Marines by contrast have always been geared to smaller units and more short term operations. The Famous "Shores of Tripoli" operation against the Barbary Pirates was carried out by 6 Marines, (And about 500 mercenaries and tribesmen under Command of the former Consul to Tunis, William Eaton).
Another example of the differences comes from WWII, In Europe the Normandy Invasion involved over a million Troops and was measured in months (11) from landing to Surrender, by contrast the largest Marine Corps operation of WWII, the landing on Okinawa, involved 1/5 that number of troops and lasted 82 days.