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Fundamental Cause
Long-term underlying factors contributing to war, including militarism, alliances, imperialism, and nationalism (MAIN).
Immediate Cause
The spark that directly ignited the war: the assassination of Archduke Franz Ferdinand.
Nationalism
Deep pride and devotion to one's nation or ethnic group; a major source of tension in Europe before WWI.
Imperialism
The policy of extending a country's power and influence through diplomacy or military force / colonizing overseas territories.
Militarism
The belief or desire of a government to maintain a strong military capability and use it aggressively.
Secret Alliances
Treaties signed between nations pledged to support one another in war without public disclosure.
Newspaper Press
Mass media that fueled nationalism, jingoism, and war fever leading up to 1914.
Triple Alliance
Pre-war alliance between Germany, Austria-Hungary, and Italy.
Triple Entente
Pre-war diplomatic alliance between Britain, France, and Russia.
Anglo-German Naval Race
The naval arms race between Britain and Germany, primarily over the construction of dreadnoughts.
HMS Dreadnought
British battleship launched in 1906 that revolutionized naval warfare with its heavy guns and steam turbine propulsion.
Balance of Power
The diplomatic concept that equal military strength between alliances prevents any single nation from dominating Europe.
Gavrilo Princip
The 19-year-old Bosnian Serb nationalist who assassinated Archduke Franz Ferdinand and his wife Sophie.
The Black Hand
The Serbian nationalist/terrorist group responsible for planning the assassination of Franz Ferdinand.
Archduke Franz Ferdinand
Heir to the Austro-Hungarian throne whose assassination in Sarajevo on June 28, 1914 triggered WWI.
Belgian Neutrality
Belgium's international neutral status, guaranteed by the 1839 Treaty of London, which was violated by Germany.
Two Front War
A war in which fighting takes place on two separate geographic fronts simultaneously (Germany facing Russia to the east and France/Britain to the west).
Schlieffen Plan
Germany's military plan to rapidly defeat France by invading through neutral Belgium before turning to face Russia.
Blank Cheque
Germany's unconditional pledge of military and diplomatic support to Austria-Hungary against Serbia.
Central Powers
The WWI coalition consisting primarily of Germany, Austria-Hungary, the Ottoman Empire, and Bulgaria.
Allied Powers
The WWI coalition initially consisting of Britain (and the British Empire), France, Russia, and later joined by Italy and the USA.
Prime Minister Borden
Sir Robert Borden; Prime Minister of Canada during World War I who introduced conscription and led Canada toward greater international autonomy.
War Measures Act
Canadian federal statute passed in 1914 granting the government sweeping emergency powers, including censorship and detention without trial.
Internment Camps
Canadian government detention facilities where thousands of immigrants from 'enemy countries' (mostly Ukrainians and Germans) were held.
Sam Hughes
Canada's controversial Minister of Militia and Defence early in WWI; known for patronage, poor equipment decisions, and cronyism.
Valcartier
Military training camp in Quebec where the first Canadian contingent (CEF) was hastily assembled and trained in 1914.
CEF
Canadian Expeditionary Force; the Canadian volunteer army sent to fight overseas in Europe during WWI.
Halifax
Critical Canadian Atlantic port city used as an assembly point for transatlantic convoys carrying troops and supplies to Europe.
Profiteering
Making excessive, unethical profits during wartime by overcharging governments or selling defective military supplies.
Ross Rifle
Canadian-manufactured rifle championed by Sam Hughes; accurate for snipers but notoriously jammed in muddy trench conditions.
MacAdam Shield Shovel
A combination spade and shield with a sight hole invented under Sam Hughes; completely useless and quickly scrapped.
Western Front
The 700-km continuous line of trenches stretching through Belgium and northern France where Canadian and Allied forces fought Germany.
Trench Warfare
Static warfare characterized by opposing armies fighting from fortified, dug-in trench systems separated by No Man's Land.
Tanks
Armoured combat vehicles first introduced by the British at the Somme in 1916 to break through barbed wire and trench stalemates.
Machine Guns
Rapid-fire automatic weapons (such as the Vickers and Maxim) that dominated the battlefield and caused horrific infantry casualties.
Barbed Wire
Defensive wire obstacle installed in No Man's Land to slow down attacking infantry and funnel them into machine gun kill zones.
Artillery
Heavy long-range guns used to bombard enemy trench lines, destroy wire, and provide creeping barrages.
Chemical Warfare
The tactical use of toxic gas (chlorine, phosgene, mustard gas) as a weapon; first deployed on a large scale at Ypres in 1915.
Airplanes
Aircraft used initially for aerial reconnaissance and artillery spotting, later developing into dogfighting and strategic bombing.
U-Boats
German submarines (Unterseeboote) used to attack Allied shipping and enforce naval blockades in the Atlantic.
No Man's Land
The barren, cratered terrain separating opposing enemy trench systems, exposed to artillery and machine gun fire.
General Douglas Haig
British Commander-in-Chief of the British Expeditionary Force on the Western Front; heavily criticized for massive casualties at the Somme and Passchendaele.
General Julian Byng
British general who commanded the Canadian Corps and meticulously prepared the successful assault on Vimy Ridge (later Governor General of Canada).
General Arthur Currie
First Canadian commander of the Canadian Corps; known for thorough preparation, tactical competence, and minimizing casualties.
Life in the Trenches
Miserable everyday existence for soldiers defined by mud, lice, trench foot, rats, cold, disease, and constant artillery shelling.
Ypres
April 1915 battle in Belgium; Canada's first major engagement where troops held the line despite the first large-scale German chlorine gas attack.
Somme
July–November 1916 offensive in northern France; resulted in over 1 million casualties, including devastating losses for the Royal Newfoundland Regiment at Beaumont-Hamel.
Vimy Ridge
April 1917 battle where all four divisions of the Canadian Corps fought together for the first time and successfully took a heavily fortified German ridge.
Passchendaele
October–November 1917 battle in Belgium infamous for knee-deep mud and waterlogged craters; captured by Canadian forces at a cost of nearly 16,000 casualties.
Stalemate
A deadlock in which neither opposing side can advance or achieve a decisive victory on the battlefield.
Total War / Attrition
Total mobilization of an entire society and economy for war, aiming to gradually wear down the enemy's resources and manpower until they collapse.
Inflation
Rapid rise in the general price of goods and living costs on the homefront during wartime.
Shell Committee
Canadian government committee formed by Sam Hughes to coordinate munitions manufacturing; plagued by scandal and inefficiency.
Imperial Munitions Board
British board that replaced the Shell Committee in 1915, successfully overseeing Canadian munitions production.
Victory Bonds
Canadian government-issued savings bonds bought by citizens to help fund the war effort.
Income Tax
Introduced in Canada in 1917 as a 'temporary' measure to pay for the mounting costs of the war effort.
Red Cross
Humanitarian organization that provided medical relief, care packages, and hospital supplies to wounded soldiers and prisoners of war.
Propaganda
Information, posters, and media designed to influence public opinion, boost recruitment, promote food rationing, and foster anti-German sentiment.
Rationing
Government-controlled limitation of food, fuel, and materials on the homefront to conserve essential supplies for the military.
Halifax Explosion
December 6, 1917 disaster in which the French munitions ship SS Mont-Blanc collided with the SS Imo in Halifax Harbour, causing the largest man-made pre-atomic explosion.
Prohibition
The legal ban on the manufacture, sale, and transportation of alcoholic beverages, introduced during WWI as a patriotic efficiency measure.
Women's Suffrage
The movement granting women the right to vote in provincial and federal elections, gaining major momentum during WWI due to women's wartime contributions.
David Lloyd George
British Prime Minister during the latter half of WWI who attended the Paris Peace Conference and signed the Treaty of Versailles.
Conscription
Compulsory enlistment of citizens for state military service (the draft).
Conscription Crisis
Intense political and social division in Canada in 1917 between English Canadians (pro-conscription) and French Canadians (anti-conscription).
Military Service Act
The August 1917 federal law that officially introduced compulsory military service (conscription) in Canada.
Henri Bourassa
Quebec nationalist politician who fiercely opposed conscription, arguing Canada should not sacrifice its citizens for British imperial wars.
Military Voters Act
1917 law allowing all Canadian active soldiers (including overseas men and women nurses) to vote in federal elections, regardless of length of residence.
Election of 1917
The fiercely contested federal 'Khaki Election' fought almost entirely over the issue of conscription.
Wartime Elections Act
1917 legislation giving the vote to female relatives of serving soldiers while disenfranchising conscientious objectors and immigrants from enemy nations naturalized after 1902.
Union Government
The wartime coalition government formed in 1917 by Robert Borden combining Conservatives and pro-conscription English Liberals.
Russian Revolution
The 1917 revolution that overthrew Tsar Nicholas II and later brought the Bolsheviks to power, leading Russia to exit WWI.
Bolsheviks
The radical communist party led by Vladimir Lenin that took power during the October Revolution of 1917.
Operation Michael
Germany's massive final Western Front offensive in March 1918 (the Spring Offensive) intended to defeat the Allies before American troops arrived in force.
The Last 100 Days
The decisive Allied offensive from August to November 1918 (spearheaded by the Canadian Corps at Amiens, Arras, and Cambrai) that forced Germany to surrender.
Kaiser Wilhelm
Wilhelm II, Emperor of Germany, whose aggressive foreign policy contributed to WWI and who abdicated in November 1918.
Armistice
The ceasefire agreement ending combat operations on the Western Front, taking effect on the 11th hour of the 11th day of the 11th month (November 11, 1918).
Paris Peace Conference
The 1919 conference where Allied leaders met at Versailles to negotiate peace terms and redraw post-war international borders.
Treaty of Versailles
The primary peace treaty signed in June 1919 that formally ended the state of war with Germany and imposed severe penalties on it.
Reparations
Mandatory financial compensations Germany was forced to pay to the Allies under the Treaty of Versailles for war damage.
Woodrow Wilson
U.S. President during WWI who championed the Fourteen Points and the creation of the League of Nations.
Wilson's 14 Points
Woodrow Wilson's post-war peace proposal emphasizing national self-determination, freedom of the seas, free trade, and collective security.
League of Nations
International organization created after WWI at the Paris Peace Conference to promote international cooperation and maintain world peace.
Collective Security
The concept that an attack on one member state of an alliance or international body is considered an attack on all members.
Sanctions
Economic, diplomatic, or trade penalties imposed by nations against a target state to compel compliance with international law.
Spanish Flu
The catastrophic 1918–1920 influenza pandemic that killed tens of millions of people worldwide as soldiers returned home from the war.