Why amphibious forces still need armor

What is the best kind of landing craft for modern amphibious warfare?

The craft matters less than landing a complete combined-arms force, including tanks and armored vehicles.

One ideal landing craft or favored capability cannot replace the rest of the force. A serious landing must put tanks, armored personnel carriers, infantry, and supporting arms ashore as a coherent battle group. Removing a major component may appear efficient when planners assume a benign opponent and tightly controlled conditions. Against a peer force, however, those missing capabilities expose the entire formation because combined arms works through mutual support rather than isolated specialization.