Austro-Hungarian Army in the context of "July Crisis"

The American Expeditionary Forces (AEF) was a formation of the United States Armed Forces on the Western Front during World War I, composed mostly of units from the U.S. Army. The AEF was established on July 5, 1917, in Chaumont, France under the command of then-major general John J. Pershing. It fought alongside French Army, British Army, Canadian Army, British Indian Army, New Zealand Army and Australian Army units against the Imperial German Army. A small number of AEF troops also fought alongside Italian Army units in 1918 against the Austro-Hungarian Army. The AEF helped the French Army on the Western Front during the Aisne Offensive (at the Battle of Château-Thierry and Battle of Belleau Wood) in the summer of 1918, and fought its major actions in the Battle of Saint-Mihiel and the Meuse-Argonne Offensive in the latter part of 1918.

Josip Broz (7 May 1892 – 4 May 1980), commonly known as Tito (/ˈtiːtoʊ/ TEE-toh), was a Yugoslav communist revolutionary and politician. During World War II, he led the Yugoslav Partisans, often regarded as the most effective resistance movement in German-occupied Europe. Tito led Yugoslavia as prime minister from 1943 to 1963, and as president from 1953 until his death in 1980. The political ideology and policies promulgated by Tito are known as Titoism.

Tito was born to a Croat father and a Slovene mother in Kumrovec in present-day Croatia, then part of Austria-Hungary. Drafted into military service, he distinguished himself, becoming the youngest sergeant major in the Austro-Hungarian Army of that time. After being seriously wounded and captured by the Russians during World War I, he was sent to a work camp in the Ural Mountains. Tito participated in some events of the Russian Revolution in 1917 and the subsequent Russian Civil War. Upon his return to the Balkans in 1920, he entered the newly established Kingdom of Yugoslavia, where he joined the Communist Party of Yugoslavia. Having assumed de facto control over the party by 1937, Tito was formally elected its general secretary in 1939 and later its president, the title he held until his death. During World War II, after the Nazi invasion of the area, he led the Yugoslav guerrilla movement, the Partisans (1941–1945). By the end of the war, the Partisans, with the Allies' backing since late 1943, took power in Yugoslavia.

The campaign to establish Austro-Hungarian rule in Bosnia and Herzegovina lasted from 29 July to 20 October 1878 against the local resistance fighters, Muslims and Orthodox Serbs, supported unofficially by troops of the Ottoman Empire. The Austro-Hungarian Army entered the country in two large movements: one from the north into Bosnia, and another from the south into Herzegovina. A series of battles in August culminated in the fall of Sarajevo on the 19 August after a day of street-to-street fighting. In the hilly countryside a guerrilla campaign continued until the last rebel stronghold fell after their leader was captured.

General of the Artillery (Feldzeugmeister) was a historical military rank in some German and Austro-Hungarian armies, specifically in artillery. It was commonly used in the 16th and 17th centuries, and survived until the beginning of the 20th century in some European countries. In the army of the Habsburg Empire, the rank of Feldzeugmeister was equivalent with lieutenant general.

Herman Potočnik (pseudonym Hermann Noordung; 22 December 1892 – 27 August 1929) was an Austro-Hungarian Army officer, electrical engineer and astronautics theorist. He is regarded as an early theorist of modern space flight and is remembered mainly for his work concerning the long-term human habitation of space.

The Battle of Galicia, also known as the Great Battle of Galicia, was a major battle between Russia and Austria-Hungary during the early stages of World War I in 1914. In the course of the battle, the Austro-Hungarian armies were severely defeated in several encounters and forced out of Galicia, while the Russians captured Lemberg (now Lviv) and, for approximately nine months, ruled Eastern Galicia until their defeat at Gorlice and Tarnów. The Battle of Galicia showed weaknesses of the Austro-Hungarian Army during that period and at the same time was one of the formidable victories of the Imperial Russian Army in the war.

The Austro-Hungarian Armed Forces (German: Bewaffnete Macht or Wehrmacht; Hungarian: Fegyveres Erő) or Imperial and Royal Armed Forces were the military forces of Austria-Hungary. It comprised two main branches: The Army (Landstreitkräfte) and the Navy (Kriegsmarine). Both of them organised their own aviation branches – the Army's Aviation Troops (K.u.K. Luftfahrtruppen) and the Navy's Naval Aviation (K.u.K. Seefliegerkorps). The Army in turn consisted of its own three branches: The Common Army (Gemeinsame Armee), the Imperial-Royal Landwehr (kaiserlich-königliche Landwehr) and the Royal Hungarian Honvéd (königlich ungarische Landwehr).

Supreme Commander of the Armed Forces was the Emperor-King, the professional leader was the Chief of the General Staff and the head of the joint Ministry for military affairs was the Minister of War.