Amphibious capability cannot be judged by routine use alone

If amphibious assaults may not happen again, why retain the capability?

They are uncommon until they are essential; reservist-supported readiness can reduce routine cost but cannot replace the underlying ships and trained force.

Amphibious assaults were dismissed after the First World War and Gallipoli, then became central again in the next conflict. Their infrequent use can make ships and specialist equipment look expendable during routine budgeting. Reserve crews and periodically exercised equipment can reduce the standing cost of preserving capacity. The large ships, trained personnel, and rehearsed organization still have to exist before a crisis makes the requirement urgent.