Portugal flag

Courtesy of C4ss from postcrossing forum

The Flag of Portugal is the national flag of the Portuguese Republic. It is a rectangular bicolour with a field unevenly divided into green on the hoist, and red on the fly. The lesser version of the national coat of arms is centred over the colour boundary at equal distance from the upper and lower edges.

The conjugation of the new field colours, especially the use of green, was not traditional in the Portuguese national flag's composition and represented a radical republican-inspired change that broke the bond with the former religious monarchical flag. These colours were popularly propagandized as representing the hope of the nation (green) and the blood (red) of those who died defending it, as a means to endow them with a more patriotic and dignified, therefore less political, sentiment.

Poland flag

Courtesy of Lidia from g+

The flag of Poland consists of two horizontal stripes of equal width, the upper one white and the lower one red. The two colors are defined in the Polish constitution as the national colors. The national flag was officially adopted in 1919. Since 2004, Polish Flag Day is celebrated on May 2.

Cuba flag

Courtesy of Lidia from g+

The Cuban flag was created by Narciso López in June 25, 1849, and put together by Emilia Teurbe Tolón. The Cuban flag's origins date from 1849, when various movements to liberate Cuba from Spanish rule emerged, mainly among Cuban exiles in the United States. Anti-Spanish Cuban exiles under the leadership of Narciso López adopted a flag suggested by the poet Miguel Teurbe Tolón. His design incorporates three blue stripes, representing the three parts that the country was divided during the independence wars, central, occidental, and oriental areas of the country, and two white stripes symbolizing the purity of the patriotic cause. The red triangle (triangle of Masonic significance) stands for the blood shed to free the nation, which is placed where the star is, symbolizing the sky turned red from the blood shed in battle. The white star in the triangle stands for independence.

Ukraine map

Courtesy of CatHouse from postcrossing forum

Ukraine (Ukrainian: Україна) is a country in Eastern Europe. It has an area of 603,628 km², making it the second largest contiguous country on the European continent, after Russia. Ukraine borders the Russian Federation to the east and northeast, Belarus to the northwest, Poland, Slovakia and Hungary to the west, Romania and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively.

USA map

The United States of America (also called the United States, the States, the U.S., the USA, and America) is a federal constitutional republic comprising fifty states and a federal district. The country is situated mostly in central North America, where its forty-eight contiguous states and Washington, D.C., the capital district, lie between the Pacific and Atlantic Oceans, bordered by Canada to the north and Mexico to the south. The state of Alaska is in the northwest of the continent, with Canada to the east and Russia to the west across the Bering Strait. The state of Hawaii is an archipelago in the mid-Pacific. The country also possesses several territories in the Pacific and Caribbean.

Belarus map

Courtesy of Lummy from postcrossing

Belarus (Belarusian: Беларусь), officially the Republic of Belarus, is a landlocked country in Eastern Europe, bordered clockwise by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital is Minsk; other major cities include Brest, Grodno (Hrodna), Gomel (Homiel), Mogilev (Mahilyow) and Vitebsk (Vitsebsk). Over forty percent of its 207,600 square kilometres (80,200 sq mi) is forested, and its strongest economic sectors are agriculture and manufacturing.

Greece flag

Courtesy of lindseylee from go2eu

The flag of Greece (popularly referred to as the galanolefki or the kianolefki, the "blue-white"), officially recognized by Greece as one of its national symbols, is based on nine equal horizontal stripes of blue alternating with white. There is a blue canton in the upper hoist-side corner bearing a white cross; the cross symbolizes eastern orthodox christianity, the established religion of the Greek people of Greece and Cyprus. According to popular tradition, the nine stripes represent the nine syllables of the phrase "Ελευθερία ή Θάνατος" ("Freedom or Death", " E-lef-the-ri-a i Tha-na-tos"), the five blue stripes for the syllables "Έλευθερία" and the four white stripes "ή Θάνατος". The nine stripes are also said to represent the letters of the word "freedom" (Greek: Ελευθερία). There is also a different theory, that the nine stripes symbolize the nine Muses, the goddesses of art and civilization (nine has traditionally been one of the numbers of reference for the Greeks). The official flag ratio is 2:3.

The above patterns were officially adopted by the First National Assembly at Epidaurus on 13 January 1822. Blue and white have many interpretations, symbolizing the colours of the famed Greek sky and sea (combined with the white clouds and waves), traditional colours of Greek clothes in the islands and the mainland, etc.

Philippines flag

The national flag of the Philippines (Tagalog: Pambansang Watawat ng Pilipinas) is a horizontal flag bicolor with equal bands of royal blue and scarlet red, and with a white equilateral triangle at the hoist; in the center of the triangle is a golden yellow sun with eight primary rays, each containing three individual rays, which represent the country's provinces; and at each vertex of the triangle is a five-pointed golden yellow star, each of which, represent the country's 3 main islands, Luzon, Visayas and Mindanao. This flag can indicate a state of war if it is displayed with the red side on top.

China Map

China ethnic groups map

The People's Republic of China (PRC), commonly known as China, is the most populous state in the world, with over 1.3 billion citizens. Located in East Asia, it is a single-party state governed by the Communist Party of China (CPC). The PRC exercises jurisdiction over 22 provinces, five autonomous regions, four directly administered municipalities (Beijing, Tianjin, Shanghai, and Chongqing), and two highly autonomous special administrative regions (SARs) – Hong Kong and Macau. Its capital city is Beijing.

At about 9.6 million square kilometres (3.7 million square miles), the PRC is the world's third- or fourth-largest country by total area, depending on the definition of what is included in that total,[16] and the second largest by land area.[17] Its landscape is diverse, with forest steppes and deserts (the Gobi and Taklamakan) in the dry north near Mongolia and Russia's Siberia, and subtropical forests in the wet south close to Vietnam, Laos, and Burma. The terrain in the west is rugged and elevated, with the Himalayas and the Tian Shan mountain ranges forming China's natural borders with India, Nepal and Central Asia. In contrast, mainland China's eastern seaboard is low-lying and has a 14,500-kilometre (9,000 mi) long coastline (the 11th longest in the world), bounded on the southeast by the South China Sea and on the east by the East China Sea, beyond which lie Taiwan, Korea, and Japan.

Cape Verde map

Courtesy of Gilles from postcrossing forum

The Republic of Cape Verde (Portuguese: Cabo Verde) is an island country, spanning an archipelago of 10 islands located in the central Atlantic Ocean, 570 kilometres off the coast of Western Africa. The islands, covering a combined area of slightly over 4,000 square kilometres (1,500 sq mi), are of volcanic origin and while three of them (Sal, Boa Vista and Maio) are fairly flat, sandy and dry, the remaining ones are generally rockier and have more vegetation. Because of the infrequent occurrence of rainfall the overall landscape is not particularly green, despite what the country's name suggests (verde is Portuguese for "green"). The name of the country stems instead from the nearby Cap Vert, on the Senegalese coast.