Land warfare

• 1. Introduction

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  Land warfare is the oldest and most widespread form of organized human violence, fought across every terrain the planet offers, from arctic tundra to desert sand to dense urban streets. It is military combat conducted on the ground surface of the earth, and for most of recorded history it has been the primary means by which nations rise, fall, and defend themselves.

  What makes land warfare distinct from other forms of conflict is its sheer human weight. It demands large numbers of combat personnel, diverse weapon systems, and mastery of wildly different environments. A soldier trained to fight in the jungle faces entirely different conditions from one fighting in the mountains or in a city block.

  Because land warfare is fought in and around the places where people actually live, it dominates the study of war. Governments plan their national defence policies around it. Budgets bend toward it. The questions it raises are unavoidable: How do you protect a city? How do you hold a valley? How do you advance across open ground when your enemy is dug in? The story of how armies have tried to answer those questions runs from untrained masses hurling themselves into frontal assaults all the way to the precision combined-arms operations of the modern era.

• 2. How Land Forces Are Built

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  Infantry are soldiers who fight on foot with small arms in organized units. That basic description has remained true across centuries, even as the means of getting infantry to the battlefield has changed. Troops might arrive by ship, by cargo plane, by automobile, or by skis, depending on the terrain and the era.

  Since World War II, land combat has largely been organized around three distinct types of combat units: infantry, armour, and artillery. Each brings something different to the battlefield, and the combination of all three is what gives modern armies their range.

  Artillery traces its name to the Old French verb attilier, meaning "to equip". Historically, the term covered any engine used to discharge projectiles during war, and it also described the ground troops who manned those weapons. Over time, artillery expanded to include coastal artillery, which defended shorelines against attack from the sea and could deny ships passage through the threat of fire. With the arrival of powered flight at the start of the 20th century, anti-aircraft batteries were folded into the artillery category as well.

  Combat vehicles complete the picture. Tanks and infantry fighting vehicles bring heavy firepower to the field, built to drive across rugged terrain and protected by armor against the threats they are likely to face. Self-propelled artillery bridges the gap between the two, carrying its firepower on a mobile platform rather than relying on a fixed emplacement.

• 3. The Logic of Combined Arms

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  No single type of unit wins a modern battle alone. Combined arms is the approach that seeks to integrate different military branches so that each compensates for the other's weaknesses and amplifies the other's strengths.

  Self-propelled artillery can suppress an enemy position. Mechanized infantry can advance under that cover. Aircraft can strike targets that ground units cannot reach. The idea is that these effects, working together, produce an outcome none of them could achieve separately.

  The combined arms concept took shape over the same period that land warfare itself was changing. Before it, armies relied on large concentrations of largely untrained fighters in frontal assaults. The shift to highly trained regular troops using a wide variety of organizational, weapon, and information systems was a gradual one, driven by the hard lessons of successive conflicts.

  The reach of land forces extended beyond the ground itself as new technologies opened new possibilities. Since the Age of Sail, amphibious warfare methods have allowed land armies to project power from the sea. Since the wide introduction of military transport aircraft and helicopters, airborne forces and vertical envelopment have added another dimension. A force that can arrive from the air, from the sea, or overland keeps an adversary uncertain about where the next threat will come from.

• 4. Terrain as a Constant Variable

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  Terrain does not negotiate. An army fighting in the arctic operates under constraints that have nothing to do with doctrine or technology and everything to do with cold, ice, and reduced visibility. Desert warfare strips away cover and amplifies heat and distance. Jungle warfare closes visibility to meters and turns movement into a slow, exhausting contest against the environment itself.

  Mountain warfare adds elevation, altitude sickness, and the tactical problem of high ground that is almost always held by whoever got there first. Urban warfare places the battlefield inside the places where civilians live and work, turning every building into a potential fortification and every street into a potential kill zone.

  This variety is why land warfare requires such a diverse set of combat skills. A soldier, a vehicle crew, or an artillery team trained for one environment may be wholly unprepared for another. The weather adds another layer. Mud stops vehicles. Snow slows movement. Rain reduces visibility and degrades communications. The range of conditions that land forces must be ready to operate in is wider than in any other domain of warfare.

  It is this combination of human complexity, environmental variability, and proximity to civilian populations that makes land warfare the central subject of national defence planning in most countries. The doctrine, the budgets, and the training structures of most armed forces are organized around the challenge of fighting and winning on the ground.