Why Fifth Brigade struggled with amphibious logistics

Did helicopter losses force the Navy to share scarce amphibious resources with the Army?

The deeper problem was that Fifth Brigade had little relevant joint or expeditionary training and did not understand the tight sequencing of amphibious resources.

Army formations accustomed to a continental NATO setting could expect equipment to be borrowed or shifted locally. In an amphibious operation, each craft and item often has a scheduled role in a constrained ship-to-shore sequence. Fifth Brigade had barely trained together for this mission, leaving its staff poorly prepared for those limits.