A flag is a piece of fabric with a distinctive design and colours. It is used as a symbol, a signalling device, or for decoration. The term flag is also used to refer to the graphic design employed, and flags have evolved into a general tool for rudimentary signalling and identification, especially in environments where communication is challenging. Many flags fall into groups of similar designs called flag families. The study of flags is known as "vexillology" from the Latin vexillum, meaning "flag" or "banner".
A national flag is a flag that represents and symbolizes a given nation. It is flown by the government of that nation, but can also be flown by its citizens. A national flag is typically designed with specific meanings for its colours and symbols, which may also be used separately from the flag as a symbol of the nation. The design of a national flag is sometimes altered after the occurrence of important historical events. The burning or destruction of a national flag is a greatly symbolic act.
The national flag of the Netherlands is a horizontal tricolour of red, white, and blue. The current design originates as a variant of the late 16th century orange-white-blue Prinsenvlag, evolving in the early 17th century as the red-white-blue Statenvlag, the naval flag of the States-General of the Dutch Republic, making the Dutch flag the oldest tricolour flag in continuous use. As a flag that symbolises the transformation from monarchy to republic, it has inspired both the derivative Russian flag, and after the French Revolution in 1789, the vertically striped French tricolour; both flags in turn influenced many other tricolours. During the economic crisis of the 1930s, the old Prince's Flag with the colour orange gained some popularity among some people. To end the confusion, the colours red, white and blue and its official status as the national flag of the Kingdom of the Netherlands were reaffirmed by royal decree on 19 February 1937.
The national flag of France is a tricolour featuring three vertical bands coloured blue, white, and red. It is known to English speakers as the Tricolour, although the flag of Ireland and others are also so known. The design was adopted after the French Revolution, where the revolutionaries were influenced by the horizontally striped red-white-blue flag of the Netherlands. While not the first tricolour, it became one of the most influential flags in history. The tricolour scheme was later adopted by many other nations in Europe and elsewhere, and, according to the Encyclopædia Britannica has historically stood "in symbolic opposition to the autocratic and clericalist royal standards of the past".
The penultimate USSR-era flag was adopted by the Russian Soviet Federative Socialist Republic (RSFSR) in 1954 and used until 1991. The flag of the Russian SFSR was a defacement of the flag of the USSR. The constitution stipulated:
The state flag of the Russian Soviet Federative Socialist Republic (SFSR) presents itself as a red, rectangular sheet with a light-blue stripe at the pole extending all the width [read height] which constitutes one eighth length of the flag.
The national flag of the Russian Federation is a tricolour of three equal horizontal fields: white on the top, blue in the middle, and red on the bottom. It was first raised in 1696, as an ensign for merchant ships under the Tsardom of Russia.
The flag of Bosnia and Herzegovina contains a medium blue field with a yellow right triangle separating said field, and there are seven full five-pointed white stars and two half stars top and bottom along the hypotenuse of the triangle.
The State Flag of the Republic of the Union of Myanmar was adopted on 21 October 2010.
The flag of Gabon is a tricolour consisting of three horizontal green, yellow and blue bands. Adopted in 1960 to replace the previous colonial flag containing the French Tricolour at the canton, it has been the flag of the Gabonese Republic since the country gained independence that year. The design of the present flag entailed the removal the Tricolour and the widening of the yellow stripe at the centre.
The flag of Paraguay was first adopted in 1842. Its design, a red–white–blue triband, was inspired by the colours of the French Tricolour, believed to signify independence and liberty. The flag is unusual because it differs on its obverse and reverse sides: the obverse of the flag shows the national coat of arms, and the reverse shows the seal of the treasury. It is the only national flag worldwide that has a unique design on each side. The flag consists of the same three horizontal colours as the flag of the Netherlands, which in turn was the inspiration for the French flag. It was revised in 2013 to bring the flag towards its original design. It has a ratio of 11:20.
The national flag of Tajikistan was adopted in November 1992, replacing the flag of the Tajik Soviet Socialist Republic of 1953. The flag features Pan-Iranian colors in a horizontal tricolor of red, white and green, with a yellow crown surmounted by an arc of seven stars at the centre. It has a width ratio of 2:3:2. The tricolor preserves the choice of colors in the former Tajik Soviet flag, as well as the 1:2 proportions.
In vexillography, the canton is a rectangular emblem placed at the top left of a flag, usually occupying up to a quarter of a flag's area. The canton of a flag may be a flag in its own right. For instance, British ensigns have the Union Jack as their canton, as do their derivatives such as the national flags of Australia and New Zealand.
A triband is a vexillological style which consists of three stripes arranged to form a flag. These stripes may be two or three colours, and may be charged with an emblem in the middle stripe. All tricolour flags are tribands, but not all tribands are tricolour flags, which requires three unique colours.
A French ensign is the flag flown at sea to identify a vessel as French. Several such ensigns have existed over the years as well as terrestrial flags based on the ensign motif.
Some of the colonies, protectorates and mandates of the French Colonial Empire used distinctive colonial flags. These most commonly had a French Tricolour in the canton.
The flag of Gran Colombia was based on Francisco de Miranda's tricolour, which served as the national flag of the First Republic of Venezuela. The general design of the Gran Colombian flag later served as the model for the current flags of Colombia, Ecuador, and Venezuela, which emerged as independent nations at the breakup of Gran Colombia in 1831.
Military aircraft insignia are insignia applied to military aircraft to identify the nation or branch of military service to which the aircraft belong. Many insignia are in the form of a circular roundel or modified roundel; other shapes such as stars, crosses, squares, or triangles are also used. Insignia are often displayed on the sides of the fuselage, the upper and lower surfaces of the wings, as well as on the fin or rudder of an aircraft, although considerable variation can be found amongst different air arms and within specific air arms over time.
Flag families are sets of national flags with similarities in their design, often based on a shared history, culture, or influence. Families do not include flags with coincidental similarities. Flags may be in multiple flag families. Only twelve current national flags existed before the 19th century, when large-scale flag use began. Seven of these flags are the inspiration for more than 130 current national flags and ensigns.
