Amphibious operations
Despite all the progress that was seen during World War II, there were still fundamental limitations in the types of coastline that were suitable for assault. Beaches had to be relatively free of obstacles, and have the right tidal conditions and the correct slope. However, the development of the helicopter fundamentally changed the equation.
The first use of helicopters in an amphibious assault came during the Anglo-French-Israeli invasion of Egypt in 1956 (the Suez War). Two British light fleet carriers were pressed into service to carry helicopters, and a battalion-sized airborne assault was made. Two of the other carriers involved, HMS Bulwark (R08) and HMS Albion, were converted in the late 1950s into dedicated "commando carriers."
Nearly 30 years later in the Falklands War, the 1st Marines Brigade of the Argentine Marine Corps along with Navy's Special Forces performed Operation Rosario landing at Mullet Creek near Stanley on 2 April 1982, while later the Royal Marines' 3 Commando Brigade, (augmented by the British Army's Parachute Regiment) landed at Port San Carlos on 21 May 1982 during Operation Sutton.

Landing at Cyprus: The Turkish Armed Forces launched an amphibious assault on 20 July 1974, on Kyrenia, following the 1974 Cypriot coup d'état. The Turkish naval force provided naval gunfire support during the landing operation and transported the amphibious forces from the port of Mersin to the island. The Turkish landing forces consisted of around 3,000 troops, tanks, armoured personnel carriers and artillery pieces.

Iran-Iraq war: During the Iran–Iraq War, the Iranians launched Operation Dawn 8 (Persian: عملیات والفجر ۸), in which 100,000 troops comprising 5 Army divisions and 50,000 men from the IRGC and the Basij advanced in a two-pronged offensive into southern Iraq. Taking place between 9 and 25 February, the assault across the Shatt al-Arab achieved significant tactical and operational surprise. The Iranians launched their assault on the peninsula at night, their men arriving on rubber boats. Iranian Navy SEALs spearheaded the offensive despite a shortage of gear. Prior to this action Iranian Naval Commandos performed reconnaissance of the Faw Peninsula. The Iranian SEALs penetrated an obstacle belt and isolated Iraqi bunkers whose troops had taken cover from the heavy rains inside or were sleeping. Iranian demolition teams detonated charges on the obstacles to create a path for the Iranian infantry waiting to begin their assault.
Not only did the amphibious landings provide a significant lodgement behind Iraq's tactical front, but they also created a psychological shock wave throughout the Persian Gulf region. Soon after the initial landings, Iranian combat engineers were able to construct bridges to improve the flow of ground troops into the lodgement area. Iran managed to maintain their foothold in Al-Faw against several Iraqi counter-offensives and chemical attacks for another month despite heavy casualties until a stalemate was reached. The Faw Peninsula was later recaptured by Iraqi forces, by the massive and illegal use of chemical weapons, the same day as the US launched Operation Praying Mantis on Iran, destroying their navy.

Persian Gulf War: During the Persian Gulf War, Assault Craft Unit 5 was able to position U.S. Marine and naval support off the coast of Kuwait and Saudi Arabia. This force was composed of 40 amphibious assault ships, the largest such force to be assembled since the Battle of Inchon. The objective was to fix the six Iraqi divisions deployed along the Kuwaiti coast. The purpose behind this amphibious maneuver (known as an amphibious demonstration) was to prevent 6 Iraqi divisions poised for the defense of the littorals from being able to actively engage in combat at the real front. The operation was extremely successful in keeping more than 41,000 Iraqi forces from repositioning to the main battlefield. As a result, the Marines maneuvered through the Iraq defense of southern Kuwait and outflanked the Iraqi coastal defense forces.

Elem War: During the Sri Lankan civil war the LTTE used amphibious warfare in some of their successful battles such as Battle of Pooneryn in 1992 and Second Battle of Elephant Pass in 2000 to overrun and capture Sri Lankan Army bases.

Iraq War: An amphibious assault was carried out by Royal Marines, U.S. Marines and units of the Polish special forces when they landed at the Al-Faw Peninsula on 20 March 2003 during the Iraq War.

Invasion of Anjouan: On 25 March 2008, Operation Democracy in Comoros was launched in the Comoros by government and African Union troops. The amphibious assault led to the ousting of Colonel Bacar's government, which had taken over the autonomous state of Adjouan.

Battle of Kismayo (2012): From 28 September to 1 October 2012, the Somali National Army launched an assault in conjuncture with allied militia led by Kenya Defense Forces to liberate the city of Kismayo from insurgent control in a first of its kind by an African military. The operation, known as Operation Sledge Hammer, started with the landing of Somali and Kenyan troops outside the city of Kismayo. By 1 October, the coalition forces were able to push Al-Shabaab out of the city.

See also: List of marines and similar forces
Marines
Navy
Raid (military)#Seaborne
US Amphibious Training Base

Notes: 

References: 

Further reading: Alexander, Joseph H., and Merrill L. Bartlett. Sea Soldiers in the Cold War: Amphibious Warfare, 1945–1991 (1994)
Bartlett, Merrill L. Assault from the Sea: Essays on the History of Amphibious Warfare (1993)
Dwyer, John B. Commandos From The Sea: The History Of Amphibious Special Warfare In World War II And The Korean War (1998)
Heck, Timothy; Friedman, B. A., eds. On Contested Shores: The Evolving Role of Amphibious Operations (Marine Corps University Press, 2020) online review of this book
Ireland, Bernard. The World Encyclopedia of Amphibious Warfare Vessels: An illustrated history of modern amphibious warfare (2011)
Isely, Jeter A., Philip A. Crowl. The U.S. Marines and Amphibious War Its Theory and Its Practice in the Pacific (1951)
Millett, Allan R.  Semper Fidelis: History of the United States Marine Corps (2nd ed. 1991) ch 12–14
Moore, Richard S (November 1982). "Ideas and Direction: Building Amphibious Doctrine". Marine Corps Gazette. 66 (11): 49–58. ProQuest 206354619.
Reber, John J (1977). "Pete Ellis: Amphibious Warfare Prophet". U.S. Naval Institute Proceedings. 103 (11): 53–64.
Venzon, Anne Cipriano. From Whaleboats to Amphibious Warfare: Lt. Gen. "Howling Mad" Smith and the U.S. Marine Corps (Praeger, 2003)

External links:  Media related to Amphibious warfare at Wikimedia Commons