From Longman Dictionary of Contemporary Englishamphibious operation/force/assaultamphibious operation/force/assaultPMan amphibious operation etc involves both sea and land vehicles → amphibious
Examples from the Corpus
amphibious operation/force/assault• MacArthur stated that it was imperative to prevent the dispatch of an amphibious force.• Operation Downfall called for two amphibious assaults.• Ross previously was assigned as executive officer of the amphibious assault ship Essex.• The amphibious assault ship Peleliu will lead the ready group, which includes the Juneau and Comstock.• Marines will be landing from several San Diego-based ships, led by the amphibious assault ships Tarawa and Peleliu.• Two other such joint exercises, involving marine and amphibious forces, were already scheduled to start on Aug. 3. 