Urban warfare
These men had fought in Mexican cities before at the Battle of Mier in 1842 and the Battle of Bexar in 1835. They understood that the army needed to "mouse hole" through each house and root out the defenders in close combat.
Worth's men used pick axes to chip holes in the adobe walls of the homes, in the roof of the house from where the soldiers could drop in, or used ladders to climb to the top of a rooftop and assault the Mexican defenders in hand-to-hand combat. The typical assault on a home would include one man who would run to the door of the house and chip the door away with a pick axe under covering fire. Once the door showed signs of weakening, 3–4 other soldiers would run to the door and barge in with revolvers blazing. Worth lost few men on the 23rd using these new urban warfare techniques.

Battle of Stalingrad: The Battle of Stalingrad is largely seen as the defining battle of urban warfare, with the battle commonly studied and referenced in studies of urban warfare. The battle was the single largest and costliest urban battle ever, with it being seen as the worst and most extreme case of urban warfare. The Battle of Stalingrad saw all types of MOUT combat techniques. Historian Iain MacGregor states that the "evolution of urban, house-to-house fighting and defending these buildings and built-up areas was seemingly born in Stalingrad in the winter of 1942". The battle "occupies a famous, notorious place in the history of war, particularly urban warfare. It seems to encapsulate and personify it, to provide an instinctive yardstick by which urban warfare can be examined, understood, defined, and assessed" according to military historian Stephen Walsh.
The Soviets used the great amount of destruction to their advantage by adding man-made defenses such as barbed wire, minefields, trenches, and bunkers to the rubble, while large factories even housed tanks and large-caliber guns within. In addition, Soviet urban warfare relied on 20-to-50-man-assault groups, armed with machine guns, grenades and satchel charges, and buildings fortified as strongpoints with clear fields of fire.

Battle of Berlin: A Soviet combat group was a mixed arms unit of about eighty men, divided into assault groups of six to eight men, closely supported by field artillery. These were tactical units which were able to apply the tactics of house to house fighting that the Soviets had been forced to develop and refine at each Festungsstadt (fortress city) they had encountered from Stalingrad to Berlin.

The German tactics in the battle of Berlin were dictated by three considerations: the experience that the Germans had gained during five years of war; the physical characteristics of Berlin; and the tactics used by the Soviets.
Most of the central districts of Berlin consisted of city blocks with straight wide roads, intersected by several waterways, parks and large railway marshalling yards. The terrain was predominantly flat but there were some low hills like that of Kreuzberg that is 66 metres (217 ft) above sea level.
Much of the housing stock consisted of apartment blocks built in the second half of the 19th century. Most of those, thanks to housing regulations and few elevators, were five stories high, built around a courtyard which could be reached from the street through a corridor large enough to take a horse and cart or small trucks used to deliver coal. In many places these apartment blocks were built around several courtyards, one behind the other, each one reached through the outer courtyards by a ground-level tunnel similar to that between the first courtyard and the road. The larger, more expensive flats faced the street and the smaller, less expensive ones were found around the inner courtyards.
Just as the Soviets had learned a lot about urban warfare, so had the Germans. The Waffen-SS did not use the makeshift barricades erected close to street corners, because these could be raked by artillery fire from guns firing over open sights further along the straight streets. Instead, they put snipers and machine guns on the upper floors and the roofs – a safer deployment as the Soviet tanks could not elevate their guns that high. They also put men armed with panzerfausts in cellar windows to ambush tanks as they moved down the streets. These tactics were quickly adopted by the Hitler Youth and the First World War Volkssturm veterans.
To counter these tactics, Soviet submachine gunners rode the tanks and sprayed every doorway and window, but this meant the tank could not traverse its turret quickly. The other solution was to rely on heavy howitzers (152 mm and 203 mm) firing over open sights to blast defended buildings and to use anti-aircraft guns against defenders posted on the higher floors.
Soviet combat groups started to move from house to house instead of directly down the streets. They moved through the apartments and cellars blasting holes through the walls of adjacent buildings (for which the Soviets found abandoned German panzerfausts were very effective), while others fought across the roof tops and through the attics.
These tactics took the Germans lying in ambush for tanks in the flanks. Flamethrowers and grenades were very effective, but as the Berlin civilian population had not been evacuated these tactics inevitably killed many civilians.

First Chechen War: During the First Chechen War most of the Chechen fighters had been trained in the Soviet armed forces. They were divided into combat groups consisting of 15 to 20 personnel, subdivided into three or four-man fire teams. A fire team consisted of an antitank gunner, usually armed with a Russian made RPG-7s or RPG-18s, a machine gunner and a sniper. The team would be supported by ammunition runners and assistant gunners. To destroy Russian armoured vehicles in Grozny, five or six hunter-killer fire teams deployed at ground level, in second and third stories, and in basements. The snipers and machine gunners would pin down the supporting infantry while the antitank gunners would engage the armoured vehicle aiming at the top, rear and sides of vehicles.
Initially, the Russians were taken by surprise. Their armoured columns that were supposed to take the city without difficulty as Soviet forces had taken Budapest in 1956 were decimated in fighting more reminiscent of the Battle of Budapest in late 1944. As in the Soviet assault on Berlin, as a short term measure, they deployed  self-propelled anti-aircraft guns (ZSU-23-4 and 2K22M) to engage the Chechen combat groups, as their tank's main gun did not have the elevation and depression to engage the fire teams and an armoured vehicle's machine gun could not suppress the fire of half a dozen different fire teams simultaneously.
In the long term, the Russians brought in more infantry and began a systematic advance through the city, house by house and block by block, with dismounted Russian infantry moving in support of armour. In proactive moves, the Russians started to set up ambush points of their own and then move armour towards them to lure the Chechen combat groups into ambushes.
As with the Soviet tank crews in Berlin in 1945, who attached bedsprings to the outside of their turrets to reduce the damage done by German panzerfausts, some of the Russian armour was fitted quickly with a cage of wire mesh mounted some 25–30 centimetres away from the hull armour to defeat the shaped charges of the Chechen RPGs.

Operation Defensive Shield: Operation Defensive Shield was a counter-terrorism military operation conducted by the Israel Defense Forces in April 2002 as a response to a wave of suicide bombings by Palestinian factions which claimed the lives of hundreds of Israeli civilians. It was in part characterized by alleged usage of human shields by both IDF and Palestinian militants.
The two major battles were held in Nablus and Jenin.

In Nablus, the Paratroopers Brigade and the Golani Brigade, backed by reservist armour force and combat engineers with armoured Caterpillar D9 bulldozers, entered to Nablus, killing 70 militants and arresting hundreds, while sustaining only one fatality. The forces deployed many small teams, advancing in non-linear manner from many directions, using snipers and air support. The battle ended quickly with a decisive Israeli victory.

In Jenin the battle was much harder and fierce. Unlike in Nablus, the forces who fought in Jenin were mainly reserve forces. The Palestinian militants booby-trapped the city and the refugee camp with thousands of explosive charges, some were very large and most were concealed in houses and on the streets.  After 13 Israeli soldiers were killed in an ambush combined with booby traps, snipers and suicide bombers, the IDF changed its tactics from slow advancing infantry soldiers backed by attack helicopters to a heavy use of armoured bulldozers. The heavily armoured bulldozers began by clearing booby traps and ended with razing many houses, mainly in the center of the refugee camp. The armoured bulldozers were unstoppable and impervious to Palestinian attacks and by razing booby-trapped houses and buildings which used as gun posts they forced the militants in Jenin to surrender. In total, 56 Palestinians and 23 Israeli soldiers were killed in the battle of Jenin.

Close-quarters battle: The term close-quarter battle refers to fighting methods within buildings, streets, narrow alleys and other places where visibility and manoeuvrability are limited.
Both close-quarters-battle (CQB) and urban operations (UO) are related to urban warfare, but while UO refers mainly to the macromanagement factor (i.e.