Austria (ⁱ/ˈɒstriə/ or /ˈɔːstriə/; German: Österreich [ˈøːstɐˌʁaɪç] ( listen)), officially the Republic of Austria (German:  Republik Österreich (help·info)), is a landlocked country of roughly 8.47 million people in Central Europe. It is bordered by the Czech Republic and Germany to the north, Hungary and Slovakia to the east, Slovenia and Italy to the south, and Switzerland and Liechtenstein to the west. The territory of Austria covers 83,855 square kilometres (32,377 sq mi) and has a temperate and alpine climate. Austria's terrain is highly mountainous due to the presence of the Alps; only 32% of the country is below 500 metres (1,640 ft), and its highest point is 3,798 metres (12,461 ft). The majority of the population speak local Austro-Bavarian dialects of German as their native language, and German in its standard form is the country's official language. Other local official languages are Burgenland Croatian, Hungarian and Slovene.

The origins of modern-day Austria date back to the time of the Habsburg dynasty when the vast majority of the country was a part of the Holy Roman Empire of the German Nation. During the 17th and 18th centuries, Austria became one of the great powers of Europe and, in response to the coronation of Napoleon I as the Emperor of the French, the Austrian Empire was officially proclaimed in 1804. In 1867, the Austrian Empire was reformed into Austria-Hungary.

Hungary ⁱ/ˈhʌŋɡəri/ (Hungarian: Magyarország [ˈmɒɟɒrorsaːɡ] ( listen)) is a country, which is located in Central Europe. It is situated in the Carpathian Basin and is bordered by Slovakia to the north, Ukraine and Romania to the east, Serbia and Croatia to the south, Slovenia to the southwest and Austria to the west. The country's capital, and largest city, is Budapest. Hungary is a member of the European Union, NATO, the OECD, the Visegrád Group, and is a Schengen state. The official language is Hungarian, also known as Magyar, which is part of the Finno-Ugric group and is the most widely spoken non-Indo-European language in Europe.

Following a Celt (after c. 450 BC) and a Roman (AD 9 - c. 430) period, the foundation of Hungary was laid in the late 9th century by the Hungarian prince Árpád, whose great-grandson Saint Stephen I was crowned with a crown sent by the pope from Rome in 1000 AD. The Kingdom of Hungary lasted for 946 years, and at various points was regarded as one of the cultural centres of the Western world. After about 150 years of partial Ottoman occupation (1541–1699), Hungary was integrated into the Habsburg Monarchy, and later constituted half of the Austro-Hungarian dual monarchy (1867–1918).

World War I (WWI), which was predominantly called the World War or the Great War from its occurrence until 1939 (World War II), and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918. It involved all the world's great powers, which were assembled in two opposing alliances: the Allies (based on the Triple Entente of the United Kingdom, France and Russia) and the Central Powers (originally centred around the Triple Alliance of Germany, Austria-Hungary and Italy; but, as Austria–Hungary had taken the offensive against the agreement, Italy did not enter into the war). These alliances both reorganised (Italy fought for the Allies), and expanded as more nations entered the war. Ultimately more than 70 million military personnel, including 60 million Europeans, were mobilised in one of the largest wars in history. More than 9 million combatants were killed, largely because of enormous increases in lethality of weapons, thanks to new technology, without corresponding improvements in protection or mobility. It was the sixth-deadliest conflict in world history, subsequently paving the way for various political changes such as revolutions in the nations involved.