Edited sentence: Amphibious assaults need such fine control and such a large degree of coordination that it is only the top tier powers that have the ability to even attempt them seriously, let alone pull them off.From the great assaults of World War II to the recent attack on the Al-Faw Peninsula in Iraq, both countries have been at the forefront of developing amphibious assault doctrine and shipping.The two nations that have made by far the most amphibious assaults during the past century are the United States and the United Kingdom