Which war had the most countries involved?
World War I
World War II
World War I
World War II
War in Afghanistan
Second World War
The Second World War
World War II
World War I
War in Afghanistan
First World War
World War II
The First World War
Second World War
World War I
The Second World War
War of 1812
War in Afghanistan
First World War
War in Afghanistan
War of 1812
World War II
World War I
The First World War
The Second World War
Vietnam War
Second World War
War in Afghanistan
War of 1812
Warsaw Uprising
World War II
World War I
First World War
War in Afghanistan
The First World War
The Second World War
War of 1812
War of the Pacific
Vietnam War
World War II
Second World War
World War I
War in Afghanistan
Warsaw Uprising
War of 1812
Warsaw Pact
War of the Pacific
The Vietnam War
The First World War
The Second World War
Vietnam War
First World War
World War 2
War in Afghanistan
World War II
World War I
War of 1812
Warsaw Uprising
Warsaw Pact
War of the Pacific
Second World War
First Indochina War
War in Afghanistan
Vietnam War
War of the Worlds
The First World War
The Vietnam War
The Second World War
War of 1812
World War II
Continuation War
Warsaw Uprising
First World War
World War I
War of the Pacific
War of the Triple Alliance
World War I.
War in Afghanistan
The Second World War.
Second World War
War of the Worlds
The Second World War
Warsaw Pact
War of 1812
Vietnam War
War in Afghanistan.
Warsaw Uprising
War of the Pacific
World War II
Korean War
World War I
War in Afghanistan
War of the Triple Alliance
First World War
War of 1812
World War II.
Warsaw Pact
The First World War.
War of the Pacific
Vietnam War
The Second World War.
The First World War
Second World War
Warsaw Uprising
War in Afghanistan
The Second World War
World War I.
War of the Worlds
World War II
War of the Triple Alliance
War in Afghanistan.
World War I
War of 1812
Warsaw Pact
War of the Pacific
First World War
War in Afghanistan
World War II
Vietnam War
War of the Worlds
Warsaw Uprising
War in Afghanistan.
The First World War
The First World War.
Second World War
World War I
The Second World War
The Second World War.
War of 1812
Warsaw Pact
War of the Pacific
War of the Triple Alliance
War in Afghanistan
World War II
Vietnam War
First World War
War in Afghanistan.
World War I
Continuation war
War of 1812
War of the Pacific
War of the Worlds
War in Afghanistan
War of the Triple Alliance
The First World War
World War II
The Second World War
Warsaw Pact
The First World War.
The Second World War.
Warsaw Pact War
Spanish Civil War
Warsaw Pact.
Second World War
World War I
War of the Six Nations
War of 1812
Vietnam War
War of the Second Coalition
War in Afghanistan
War of the Pacific
War of the Worlds
World War II
War in Afghanistan.
Warsaw Pact War
First World War
Warsaw Pact
World War I
Spanish–American War
The First World War
War of the First Coalition
The Second World War
Warsaw Pact.
War of 1812
WWII
War in Afghanistan
The First World War.
War of the Pacific
World War II
Vietnam War
The Second World War.
Second World War
War of the Triple Alliance
War in Afghanistan.
WWII
World War I
War of 1812
Spanish–American War
War in Afghanistan
World War II
War of the Pacific
WWII
War of the Third Coalition
Second World War
The First World War
Warsaw Pact War
The Second World War
War of the Six Nations
War of the Ring
World War I
World War 2