The Battle of Stallupönen, fought between Russian and German armies on August 17, 1914, was the opening battle of World War I on the Eastern Front. The Germans under the command of Hermann von François conducted a successful counterattack against four Russian infantry divisions from different infantry corps, which heavily outnumbered them but were separated from each other, creating a gap between the 27th Infantry Division and the 40th Infantry Division, and had little coordination with each other. The Germans retreated to Gumbinnen thereafter.
The Brusilov offensive, also known as the June advance, or Battle of Galicia-Volhynia, of June to September 1916 was the Russian Empire's greatest feat of arms during World War I, and among the most lethal offensives in world history. The historian Graydon Tunstall called the Brusilov offensive the worst crisis of World War I for Austria-Hungary and the Triple Entente's greatest victory, but it came at a tremendous loss of life. It was arguably the most successful offensive in the entirety of the First World War. The victory contributed to a morale upsurge among the Russian troops, in 1917, Nicholas II planned a general offensive along the entire front in order to end the Central Powers. After the victory, the Petrograd conference was held at which the post-war structure of the world was discussed. Even despite the losses, the Russian armies were still being reinforced with new forces, the number of weapons increased, and new railways were being built. The offensive's success led Russia's allies to reconsider their positions on postwar territorial concessions, including the status of Anatolia and the Bosphorus Strait.
The Second Battle of the Masurian Lakes or Winter Battle of the Masurian Lakes, known in Germany as the Winter Battle in Masuria and in Russia as the Battle of Augustowo, was the northern part of the Central Powers' offensive on the Eastern Front in the winter of 1915 during World War I. The offensive was intended to advance beyond the Vistula River and perhaps knock Russia out of the war. It was the last major battle fought on German soil during World War I.
The Lake Naroch offensive in 1916 was an unsuccessful Russian offensive on the Eastern Front in World War I. It was launched at the request of Marshal Joseph Joffre and intended to relieve the German pressure on French forces. Due to lack of reconnaissance, Russian artillery support failed to overcome and neutralise the well-fortified German defenses and artillery positions, leading to costly and unproductive direct attacks, hindered by the weather. On 30 March General Evert ordered a halt to the offensive.
Aleksei Ermolaevich Evert was an Imperial Russian general of German descent.
The Battle of Kostiuchnówka was a World War I battle that took place July 4–7, 1916, near the village of Kostiuchnówka (Kostyukhnivka) and the Styr River in the Volhynia region of modern Ukraine, then part of the Russian Empire. It was a major clash between the Russian Army and the Polish Legions during the opening phase of the Brusilov Offensive.
The Rovno offensive — the operation of the Austro-Hungarian Northern armies against the armies of the Russian Southwestern Front — the so-called campaign on Rovno, or Lutsk-Rovno offensive operation. The purpose of the offensive was the liberation of Eastern Galicia, but by the end of the operation, a small part of Eastern Galicia was still held by the Russian Imperial Army.
The Great Retreat was a strategic withdrawal and evacuation on the Eastern Front of World War I in 1915. The Imperial Russian Army gave up the salient in Galicia and the Polish Congress Kingdom. The Russian Empire's critically under-equipped military suffered great losses in the Central Powers' July–September summer offensive operations, which led to the Stavka ordering a withdrawal to shorten the front lines and avoid the potential encirclement of large Russian forces in the salient. While the withdrawal itself was relatively well-conducted, it was a severe blow to Russian morale.
The 10th Army was a field army of the Imperial Russian Army during the First World War.
The Carpathian Front, sometimes referred to as the Carpathian Winter War of 1915 was one of the largest military operations on the Eastern Front in terms of scale, duration, the number of troops involved in it and the losses of the parties.
The offensive of the Russian armies in October 1914 with the aim of capturing East Prussia after in Battle of Augustów (1914).
The Vistula–Bug offensive from July 13 to August 28, 1915, was a major Central Powers offensive with the decisive role of the German Imperial Army during World War I on the Eastern Front to defeat the forces of the Russian army in South Poland and Galicia.
The Dniester front a series of battles on the eastern front between Russia and the central powers summer offensive.
The Riga–Schaulen offensive was a major Imperial German Army's offensive, launched by the Army of the Niemen of Paul von Hindenburg's group of armies to divert Russian forces from the direction of the main German blow of the summer offensive on Narew. However, it gradually changed into an offensive of two German armies to capture the Kovno fortress and reach the Western Dvina. In the course of a successful offensive, the German army defeated the superior forces of the Russian army and reached the approaches to the important city of Riga.
The Battle of Łomża was a series of large-scale battles between the Imperial German and Imperial Russian armies in the spring of 1915 on the territory of modern Poland. The Russians were able to repulse the Second German offensive on Przasnysz, but the Imperial German army also repulsed several major offensives of the Russian army.
The 9th German Army acted versus the Russian armies west of the Vistula River. After the completion of the fighting at Humin and Wola Szydłowska, there was some calm in this sector, especially before the Russian 2nd Army. But, having received the task of pinning down the Russian troops here, the commander of the German 9th Army, General of the Cavalry August von Mackensen, decided by going on the offensive not only to help the Austro-Hungarian troops in the Carpathians, but, if successful, push back Russian 5th Army to Warsaw.
First Riga offensive was a military operation of the German Imperial Army with to divert Russian forces from the direction of the main blow of the German summer offensive on Narew River. The Germans broke through the heavily fortified defenses of the Russian army and defeated the vastly superior enemy forces. However, no decisive success was achieved, and at the beginning of August the Russians launched a counteroffensive.
The Vilno-Dvinsk offensive or Battle of Vilnius took place in the autumn of 1915 between the cities of Vilnius and Daugavpils. It was strategic withdrawal by Russian forces on the Eastern Front of World War I, after a successful summer German offensive. The German armies were under the command of Supreme Commander of All German Forces in the East, Field Marshal Paul von Hindenburg. Although weakened by the transfer of 12 divisions to France and the Balkans, as part of taking a defense, Hindenburg had his forces conduct several secondary offensive operations. Half of the Russian forces and the main German forces on the eastern front took part in the battle. However, the numerical superiority of the Russians did not allow Hindenburg to achieve a lasting success. Further actions for the Germans were unsuccessful as they suffered losses without achieving their goal of taking Daugavpils.
The Second Brusilov offensive took place in July–August 1916 on the Eastern Front during the First World War. As a result of the First Brusilov offensive in May–June 1916, the Imperial Russian army defeated the Austro-Hungarian troops and captured a large number of prisoners. But Imperial German army came to the aid of its ally. In July 1916, all Austro-Hungarian troops were subordinated to Paul von Hindenburg and Erich Ludendorff and Hindenburg became commander-in-chief of the entire Eastern Front. The weakest sections of the Austro-Hungarian front were reinforced by German divisions, and most importantly, in the direction of the impending main attack of the Russian Southwestern Front, the defense was mainly occupied by German troops. The offensive was ambiguous, in central Galicia and on the Dniester, the Russians achieved decisive results, but the attacks on Kovel failed. At the same time, the Russians practically stopped losing soldiers captured and killed, but the central powers suffered losses mostly irretrievably.
The Battle of Krakow ; took place on the Eastern Front during World War I from November 16 to November 28, 1914. In western Galicia, the 9th and 3rd Russian armies advanced to the Dunac and pushed back the 4th Austro-Hungarian army between Krakow and the northern slopes of the Beskids. A counterattack by retreating Austro-Hungarian troops in the northern section of the Vistula was repulsed by the Russians, and then came to a standstill. As a result of the unsuccessful attacks of the 9th German Army in the decisive Battle of Lodz, the battles for Krakow were interrupted by both sides after two weeks of fighting. At the end of November, the chief of the General Staff of Austria-Hungary, Franz Conrad von Hötzendorf, hastily began to regroup for a new counteroffensive at Limanova-Lapanov to stop the Russian breakthrough in northern Hungary.
Germany 
Austria-Hungary 
Russian Empire 