When an amphibious landing becomes a land campaign

When does amphibious warfare transition into land warfare?

It changes when the landed force has sufficient control, supplies, and support to request a formal transfer of operational command into a land task force.

A joint arrangement in which the naval amphibious commander retains a veto on unsafe maritime activity while the land-force commander shapes the landing. Once the force is established with its artillery and a safe area, it can request a change of operational command; the ships may then support ashore, undertake another landing, or return to other naval tasks. This formal transfer prevents the land campaign from outrunning the beachhead's supply and fire-support capacity. It also shows that amphibious command is a negotiated joint relationship rather than simple naval or army ownership from start to finish.