-
Austria-Hungary declared war on Serbia, beginning WWI
On the 25th, Serbia decreed a general mobilization and that same night declared that it accepted all the terms of the ultimatum, except the one that demanded the sending of an Austrian delegation to Serbia to participate in the investigation of the assassination. The next day, Austria severed diplomatic relations with Serbia, and on the 28th, Austria-Hungary declared war on Serbia. -
Beginning of the U-Boat campaign
The U-Boat Campaign was a naval campaign within the framework of WWI that began on July 28, 1914. In it, the U-Boats, the name given to German submarines, and the U-boats fought on the side of the Central Powers. remainder of the German surface fleet, the Imperial German Navy. On the side of the Entente Cordiale, the British Royal Army stood out. This campaign took on a global character, taking place in all the seas of the world, highlighting the North Atlantic and the Mediterranean Sea. -
Russia mobilizes its troops to the south, they support Serbia
On July 29, Russia came to the aid of Serbia and declared partial mobilization against the Austro-Hungarian Empire.
On the 30th Russia ordered a general mobilization against Germany, and in response, it declared itself in a state of danger of war. -
Germany declares war on Russia
Kaiser Wilhelm II of Germany asked Tsar Nicholas II of Russia to stop the general mobilization of his country, to which he refused and to which Germany responded with an ultimatum demanding Russian demobilization and the commitment not to support Serbia . Another was sent to France, where it was asked not to support Russia if it came to the defense of Serbia. On August 1, after Russia's negative response, Germany mobilized and declared war on Russia. -
Germany invades Luxembourg
-
Germany declares war on France
-
The Ottoman Empire proclaims neutrality
-
The Kingdom of Italy proclaims neutrality
-
The Kingdom of Romania proclaims neutrality
-
Germany declares war on Belgium
On August 4, Germany declares war on Belgium, prompting the Unitd Kingdom to declare war on Germany on the same day, following the British ultimatum to maintain Belgium's neutrality. -
Argentine proclaims neutrality
-
Period: to
The Battle of Liège
The Battle of Liège was the start of the German invasion of Belgium and the first battle of World War I. The attack on the city began on August 4, 1914, and lasted until the 16th of the same month, when the last fort surrendered. The invasion of Belgium was the event that triggered the entry of the United Kingdom of Great Britain and Ireland into the war, the unexpected vigor of the city's defense gave more time for the Western Allies to organize and prepare their defense of France. -
Spain proclaims neutrality
-
Period: to
Battle of the Borders
The Battle of the Borders are the five offensives launched by the French army, and the German army, that were fought in the border regions of France and Belgium. These battles were:
* The battle of Mulhouse
* The battle of Lorraine
* The battle of the Bulge
* The Battle of Charleroi
* The battle of Mons -
Period: to
The Battle of Mulhouse
The Battle of Mulhouse took place from August 7 to 10, in the Alsace region. It was the first French offensive response to the German invasion. The attack of several divisions of the VII Corps of the French army achieved the occupation of Mulhouse on the 8th, however the Germans recaptured it on the 10th. -
The Battle of Haelen
The Battle of Haelen was a cavalry battle during the German invasion of Belgium. It took place on August 12 between German forces and Belgian troops, which resulted in a tactical victory for the Belgians. -
Ultimatum from the Japanese Empire to the German Empire
On August 14, Tokyo sent an ultimatum to Germany to abandon its colonies in China, and the archipelagos of the Marshall Islands, the Marianas, and the Carolinas. -
Period: to
Battle of Lorraine
The Battle of Lorraine took place between August 14 and 25 at the start of hostilities by the German army. The French army could not face the German advance and to counter the German advance, the French army followed Plan XVII, which provided for a French offensive through Lorraine and Alsace, to penetrate into Germany itself. -
Period: to
Battle of Cer
The Battle of Cer was a military confrontation that took place between August 16 and 19. It was contested between the Austro-Hungarian Army and the Serbian Army, and marked the first victory of the Allies over the Central Powers in WWI. -
Period: to
The Battle of Stalluponen
The Battle of Stalluponen, which took place between August 17 and 23 in Stalluponen, marked the first victory of the German armies over the Russian armies.
Being the result of the aggressive tactics of the German general Hermann von François to defend East Prussia against the advances of the tsarist armies. -
Battle of Gumbinnen
The Battle of Gumbinnen, started by the Germans at dawn on August 20, was the first major offensive on the Russian front during WWI. He faced the Armies of Germany and Russia. -
Battle of Charleroi
The Battle of Charleroi was fought on August 21, 1914, between the German and French armed forces; the French were planning an attack across the Sambre River, when the Germans launched an attack; the Germans were ultimately victorious -
Period: to
Battle of the Ardennes
The Battle of the Ardennes was a battle fought on the borders of France, Germany, Belgium, and Luxembourg on August 21–23, 1914. The German armies defeated the French armies and forced the French armies to retreat. -
Battle of Mons
The Battle of Mons was the first engagement in which the British Expeditionary Force took part. The British Expedition Corps clashed at Mons on August 23, 1914 with the right wing of the German Army that was invading that country. -
Japan enters WWI
Japan entered World War I on the side of the Allies on August 23, taking the opportunity of Imperial Germany's distraction with the European war to expand its influence in China and the Pacific. -
Period: to
Battle of Galicia
The Battle of Galicia, also known as the Battle of Lemberg, was a major battle between Russia and Austria-Hungary. In the course of the battle, the Austro-Hungarian armies were defeated and forced out of Galicia, while the Russians captured Lemberg. -
Battle of Le Cateau
The Battle of Le Cateau was fought on the Western Front on August 26. It was a delaying action by the British and French to stop the German pursuit so that both the British Expeditionary Force and the French Fifth Army withdrew towards San Quentin. -
Period: to
Battle of Tannenberg
The Battle of Tannenberg was fought from August 26 to 30, near the town of Allenstein. They faced the army of the German Empire against the army of the Russian Empire. The result was a crushing German victory. -
Battle of Heligoland Bay
The Battle of Heligoland Bay was the first naval battle of WWI, fought on August 28 between the British and German navies. The battle took place in the south-east of the North Sea, when the British attacked German patrols off the north-west coast of Germany.
The battle was hailed as a great victory in Britain, where crowds of people in the ports cheered for the returning ships. -
Period: to
Battle of San Quentin
The Battle of San Quentin took place on August 29 and 30, 1914 in the surroundings of the French towns of Guise and San Quentin between the French and German armies. This battle was a holding battle to slow down the pursuit of the Germans, which threatened to disorganize the French armies and their British ally. Although it was a tactical German victory, it fulfilled the objective of stopping the German push and allowing the French reorganization. -
Period: to
First battle of the Marne
The First battle of the Marne took place between September 5 and 12, 1914. The result was an Allied victory over the German army. The battle was the high point of the German advance into France and the pursuit of the Allied armies after the border battles in August. Counter-attack by six French field armies and the British Expeditionary Force along the River Marne forced the Imperial German Army to withdraw to the north-west. -
Period: to
Battle of Drina
The Battle of Drina was a battle fought between September 6 and October 4, between the Serbian and Austro-Hungarian armies. The Austro-Hungarians launched an offensive over the Drina river on the western Serbian border. In early October, a withdrawal was forced, and the Serbian army was later regrouped for the fight at the Battle of Kolubara. -
Period: to
First battle of the Masurian Lakes
The First Battle of the Masurian Lakes was a confrontation that took place in September 1914 between the German and Russian armies during the Prussian campaign. They finished with a slight German lead that was nullified by the end of the month due to a Russian counter-offensive. -
Battle of Bita Paka
The Battle of Bita Paka was fought on 11 September south of Kabakaul on the island of New Britain, and was part of the invasion and subsequent occupation of German New Guinea by the Australian Naval and Military Expeditionary Force. -
Australians occupy the German Solomon Islands
On September 12, 1914, an Australian expeditionary force landed on the German side of the Island of New Guinea and occupied the Bita Paka radio station after a brief fight.
The next day a small force landed on North Solomon Island, where they managed to occupy Boungaiville. This victory allowed the allies to seize an important supply point from the German ships of the Far East Naval Squadron, which increased their difficulties to navigate in those latitudes. -
Period: to
First Battle of the Aisne
The First Battle of the Aisne was the Allied offensive against the Eastern Front of the German First Army and Second Army withdrawn after the First Battle of the Marne. The offensive began on the night of September 13, after a hasty search by the Germans, and ended on the 28th of the same month. -
Period: to
Battle of Tsingtao
The Battle of Tsingtao consisted of the Allied assault on the German port of Tsingtao. The confrontation ended in German defeat at the hands of the combined forces of Japan and the United Kingdom. -
Action of September 22, 1914
The Action of September 22, 1914 was a naval engagement that took place in which three Royal Navy armored cruisers were sunk by a German submarine while on patrol. The incident damaged the reputation of the Royal Navy at a time when many countries considered it Britain's main support in the war. -
Period: to
Battle of Albert
The Battle of Albert took place between September 25 and 29, and was part of the well-known Race to the Sea. -
Siege of Antwerp
The siege of Antwerp was a military episode of the Western Front of WWI, during the German offensive in Belgium in the early phases of the conflict, in which the German Empire, together with some units of the Austro-Hungarian Empire, attacked the Belgian Army, which had with the support of some units of the British Empire. -
Period: to
First battle of Ypres
The First Battle of Ypres was the last long battle of the first year of WWI. It was a series of battles, beginning on October 19 and ending according to various stories on November 13, November 22, or November 30. -
Battle of Coronel
The Battle of Coronel was a naval confrontation that took place in Chilean territorial waters, off Coronel Bay, on November 1. The combatants were a German fleet commanded by Admiral Maximilian von Spee and a British fleet commanded by Admiral Sir Christopher Cradock. The battle ended in victory for the Germans. -
Russia, UK and France declare war on Turkey
-
Period: to
Battle of Tanga
The Battle of Tanga, fought between the 3rd and 5th of November between the colonial armies of Great Britain and Germany, was the largest confrontation of the First World War that took place on African soil. The failed objective of the British was the occupation of German East Africa. -
United Kingdom joins Cyprus
-
Japan occupies the Mariana Islands, the Caroline Islands, and the Marshall Islands
-
Battle of Las Cocos
The Battle of Las Cocos was a naval action and one of the first. The Cocos Islands Telegraph was a vital strategic point linking Great Britain, Australia and New Zealand. This was attacked on November 9, 1914 by the German light cruiser SMS Emden in an amphibious action. HMAS Sydney, an Australian cruiser, responded to the attack and claimed victory by destroying the German ship. -
Period: to
Battle of Łódź
The Battle of Łódź took place between November 11 and December 6 and was fought by the Russian and German Empires in the vicinity of Łódź. It is considered an inconclusive battle with no defined winner. -
Period: to
Battle of Kolubara
The Battle of Kolubara was an armed confrontation between the Kingdom of Serbia and the Austro-Hungarian Empire that took place during World War I. It ended with the victory of the Serbs, who drove the Austro-Hungarian invaders from their territory. -
Turkey goes to war with the Central Powers
-
Battle of the Malvinas Islands
The Battle of the Malvinas Islands was a naval combat fought on December 8 between a German squadron and a British squadron anchored in Puerto Argentino in the Malvinas Islands. The combat ended with a British victory, the destruction of the German squadron and the death of its best commander, Count Maximilian von Spee.
