Human wave attack
In response to the media's stereotype of Chinese assault troops deployed in vast "human seas", a joke circulated among the US servicemen was "How many hordes are there in a Chinese platoon?"
In Chinese sources, this tactic is referred to as "three-three fireteams," after the composition of the attack: three men would form one fireteam, and three fireteams would form one squad. A Chinese platoon, consisting of 33 to 50 soldiers (depending on if they had a heavy weapons team), would form their squads in ranks in a staggered arrowhead formation, which would be employed to attack "one point" from "two sides."
Although abandoned by the PVA by 1953, outside observers such as Allen S. Whiting expected China to use the tactic if necessary. The Chinese army re-adopted this tactic during the Vietnam War and Sino-Vietnamese War due to the stagnation of the Chinese military modernization programs during the Cultural Revolution. Their use in the Sino-Vietnamese War is a rare example of an army with superior firepower, in this case the PLA, throwing away its advantage.

Iran–Iraq War: During the Iran–Iraq War, some of the attacks conducted by Iranian forces in large operations, were considered to be human wave attacks.

Eritrean-Ethiopian War: In the Eritrean–Ethiopian War of 1998-2000, the widespread use of trenches has resulted in comparisons of the conflict to the trench warfare of World War I. According to some reports, trench warfare led to the loss of "thousands of young lives in human-wave assaults on Eritrea's positions".

Russian invasion of Ukraine: During the Russian invasion of Ukraine starting in 2022, the Ukrainian military and Western media reported that the Russian military use human wave attacks to overcome Ukrainian defenses.
During the battles of Bakhmut, Vuhledar, and Avdiivka, it was claimed that Russian Army regulars were sent into the battles using human wave tactics to capture the towns. Wagner Group paramilitary units also used "human wave attacks" using convicts recruited from prisons to fight in Ukraine, including those in the Storm-Z and Storm-V units. It was also claimed that the Russian infantry sent in "human wave" attacks are poorly trained and equipped, with minimal or no mechanized or air support. Rear Admiral John Kirby, spokesperson for the U.S. National Security Council, claimed that Russia threw "masses of poorly trained soldiers right into the battlefield without proper equipment, and apparently without proper training and preparation." Russian troops have claimed that they were threatened with being shot by barrier troops if they retreated from attacks.
The term ″meat grinder″ has been used to describe these tactics used by Russia in attempts to wear down Ukrainian forces and expose their positions to Russian artillery. According to NATO and Western military officials, around 1,200 Russian soldiers were killed or wounded in Ukraine every day on average in May and June 2024, mainly due to the use of Soviet tactics of human wave attacks.

See also: Attrition warfare
Cannon fodder
Swarming (military)
Creeping barrage
M18 Claymore – land mine designed in 1952 as a response to human wave attacks in Korea

Notes: 

References: Alexander, Bevin R. (1986), Korea: The First War We Lost, New York, NY: Hippocrene Books, Inc, ISBN 978-0-87052-135-5
Appleman, Roy (1989), Disaster in Korea: The Chinese Confront MacArthur, College Station, TX: Texas A and M University Military History Series, 11, ISBN 978-1-60344-128-5
Appleman, Roy (1990), Escaping the Trap: The US Army X Corps in Northeast Korea, 1950, College Station, TX: Texas A and M University Military History Series, 14, ISBN 0-89096-395-9
Beevor, Antony (1998). Stalingrad. London: Viking. ISBN 978-0-14-103240-5.
Davis, Paul K. (2001), 100 Decisive Battles: From Ancient Times to the Present, New York, NY: Oxford University Press USA, ISBN 978-0-19-514366-9
George, Alexander L. (1967), The Chinese Communist Army in Action: The War and its Aftermath, New York, NY: Columbia University Press, OCLC 284111
Mahoney, Kevin (2001), Formidable Enemies: The North Korean and Chinese Soldier in the Korean War, Novato, CA: Presidio Press, ISBN 978-0-89141-738-5
Marshall, S.L.A. (1988), Infantry Operations and Weapon Usage in Korea, London, UK: Greenhill Books, ISBN 0-947898-88-3
O'Dowd, Edward C. (2007), Chinese Military Strategy in the Third Indochina War, New York, NY: Routledge, ISBN 978-0-415-41427-2
Roe, Patrick C. (2000), The Dragon Strikes, Novato, CA: Presidio, ISBN 0-89141-703-6

External links: Footage of human wave attacks during the Korean war
Documentary clip highlighting Iran's Human Wave Attacks vs. Iraq 1982