Organization: How Armies are Formed for War

In Short

Hubert Foster presents a systematic study of how modern armies are organized to execute war, filling a gap in early twentieth-century military literature. Moving from foundational principles of command to detailed descriptions of infantry divisions, artillery batteries, and medical services, the book compares European and global military structures before detailing the British Expeditionary Force. Foster anchors his technical exposition in historical development, showing how feudal units evolved into modern army corps. The work endures as a crisp, authoritative snapshot of pre-World War I military planning, highlighting the eternal tension between rigid organizational symmetry and operational flexibility.

The Story

Foster opens by defining the precise scope of military organization, distinguishing it from general preparation or field tactics. Organization, he argues, exists solely to facilitate command by creating a logical, unbroken chain of authority. He begins with the primary fighting components—cavalry, infantry, and artillery—explaining the tactical function, limitations, and standard subunit sizing of each. Cavalry, though costly and constrained by rough terrain, provides critical reconnaissance and protective screening; artillery acts through the battery as its core tactical unit; and infantry forms the ultimate backbone of the field force.

Moving from basic units to higher formations, Foster details how batteries, battalions, and squadrons are combined into brigades, divisions, and army corps. He highlights the division as the primary self-contained fighting block, contrasting British multi-brigade setups with Continental foreign models. To manage these complex aggregations, Foster analyzes staff architecture, demonstrating how duties are split between the General Staff—which handles intelligence and operation orders—and administrative branches like the Adjutant-General’s staff, responsible for personnel, discipline, and casualties.

In the central portion of the book, Foster shifts from generic principles to a concrete examination of the British Expeditionary Force. He provides an exhaustive breakdown of its components, detailing specialized units such as Divisional and Army Troops Telegraph Companies, Balloon Companies for aerial reconnaissance, and the Royal Army Medical Corps' Field Ambulances. He illustrates how the British system intentionally avoids rigid Army Corps layers to ensure supreme command flexibility, enabling brigades and divisions to detach self-contained units without administrative chaos. This detail is bolstered by a comparative review of global military structures, outlining the fighting strengths, guns, and squad allocations of nations like Italy, Japan, Switzerland, and the United States.

Foster then traces the historical evolution of these structures. He shows how the modern major and sergeant originated from the Reiter and Landsknecht regiments of earlier centuries, how light infantry and skirmishers differentiated from heavy line troops, and how field artillery and engineering corps slowly gained independent status. He tracks how Napoleon popularized the variable Army Corps to confuse enemy planners, a system later formalized by Prussia.

Finally, the argument culminates in an exploration of military command and psychological leadership. Foster contends that an army is essentially an organized "dynamic crowd," where unreasoned, instinctive discipline must overcome raw panic. Because national character traits remain remarkably persistent over centuries, a leader's sheer strength of will matters far more than mere intellectual agility. He closes by advocating for a modernized, precise military terminology, arguing that clear, brief words save vital time when writing battlefield orders.

How It Unfolds

Defining the scope The book opens by clearing away broad definitions of war preparation to isolate organization as the specific art of designing units to facilitate command. Foster outlines the direct chain of authority from supreme commanders down to tactical subunits.

Analyzing the fighting arms The narrative examines cavalry, artillery, and infantry in detail, weighing their operational costs, weapon types, and modes of fighting. Foster explains why cavalry must separate reconnaissance from protection duties and details how artillery batteries are structured globally.

Building higher formations Foster explains how basic fighting units are combined into divisions and army corps, detailing the essential balance between fighting troops and supporting services. He introduces the General Staff's role in operations and intelligence alongside administrative support branches.

Dissecting the British model Focusing on the British Expeditionary Force, the text details specialized support units including telegraph companies, balloon reconnaissance units, field ambulances, and veterinary services. Foster demonstrates how this specific layout optimizes flexibility and subdivision.

Comparing global powers The focus broadens to catalogue the war organization of foreign armies, contrasting continental reliance on rigid corps structures with the varied battalion, brigade, and artillery ratios used across Europe, Asia, and the Americas.

Tracing historical roots Foster walks through centuries of military evolution, explaining how ancient ranks like the Fourier and Feldwebel became modern quartermasters and sergeants. He details the development of light infantry skirmishers, specialized engineer corps, and Napoleon's tactical use of massed reserves.

Evaluating command psychology The final section examines the human element of command, treating an army as a disciplined crowd governed by habit and deep-rooted national characteristics. Foster concludes by urging the adoption of concise, logical military terminology to prevent confusion in operational orders.

The People

The Commander-in-Chief Standing at the top of the organizational structure, this figure holds the devolved authority of the State to execute war operations. The Commander needs an unyielding strength of will rather than mere intellectual brilliancy to maintain resolution under strain. To avoid being overwhelmed by routine details, the Commander relies entirely on a well-structured General Staff.

The Chief of the General Staff Serving as the primary operational engine behind the Commander, the Staff directs intelligence gathering, map preparation, and the draft of concise operation orders. Historically exemplified by Napoleon—who acted as his own Chief of Staff—this role requires organizing messy information into clear, actionable movements across complex theatres of war.

The Battery Commander and Divisional General Representing field-level leadership, these figures orchestrate combined-arms action. The Battery Commander (a Captain, Major, or Lieutenant-Colonel depending on the nation) coordinates range-finders, gunners, and ammunition wagons, while the Divisional General manages a balance of infantry brigades, cavalry squadrons, and field engineers.

The Sergeant and Quartermaster Emerging historically from the 16th-century Feldwebel and Fourier, these pivotal subaltern figures maintain unit discipline and material survival. The Sergeant manages battle drills and gives immediate orders on the field, while the Quartermaster handles logistics, shelter, food, and historical reconnaissance, keeping the fighting line fed and supplied.

In Its Own Voice

"The use of Cavalry in modern war lies less in its action on the battlefield than in the all-important work of reconnoitring the enemy, and protecting its own army..."

Foster explains that the traditional mounted charge has largely yielded to the critical operational demands of gathering intelligence and providing screen security.

"Discipline is not only the instinct of obedience, but that of reliance on leaders and comrades, both factors of enormous value in battle."

In discussing human behavior under fire, the author emphasizes how habitual training transforms a crowd into a cohesive fighting force.

"Simplicity and symmetry are obviously useful in saving difficulties to the Staff; but this advantage may be bought too dearly, and a complicated and illogical organization might be the best for war, so as to prevent the enemy acquiring information."

Reflecting on Napoleonic history, Foster observes that perfect organizational neatness can unintentionally give away an army's true strength to enemy intelligence.

What It's Really About

At its core, Organization: How Armies are Formed for War is an investigation into how human institutions manage immense complexity under extreme stress. Foster argues that an army is not merely a collection of armed men, but a carefully engineered system meant to transmit a single commander's intent down to thousands of individuals without friction or delay.

The book explores the constant tension between theoretical symmetry and practical adaptability. While neat, standardized force structures make staff planning easy, Foster points out that irregular configurations—like those used by Napoleon—can confuse enemy planners and offer superior tactical flexibility. Beneath the technical data on gun batteries and cable companies lies a psychological inquiry: how to construct a rigid mechanical system out of volatile human beings whose rational minds inevitably falter under the terror of combat.

Why Read It Today

Navigating Hubert Foster’s work feels like stepping into a detailed military control room on the eve of the First World War. It will deeply appeal to historians, military enthusiasts, and readers curious about administrative systems, offering a clear window into how world powers structured their forces just prior to modern industrialized warfare. Foster writes with quiet confidence, completely devoid of sensationalism or modern tactical jargon, letting specific numbers, equipment lists, and structural ratios carry the narrative weight.

Readers must be prepared for dense administrative breakdowns, itemized lists of wagons, horses, and personnel counts, as well as period terminology and early twentieth-century geopolitical perspectives. Yet, what lingers after reading is Foster’s profound appreciation for functional clarity. His closing plea for simpler terminology—replacing cumbrous phrases with direct words like "Foreguard Chief" or "stow"—reveals a thinker who recognized that administrative clarity and linguistic precision are essential tools for survival.