Eder returned to Bucharest after spending most of the country for half a month.

In the middle of this spring, the war that had subsided in Europe began again. On the Western Front, because of the trenches, the British, French and German armies could not move, so both sides looked to their areas.

At the beginning of 1915, the Germans took the lead in the Battle of Masurihu on the Eastern Front. In this battle, the Russian Tenth Army, which was the main force attacking East Prussia, was heavily damaged, and the Russian army was forced to withdraw to the east bank of the Neman River to hold on, giving up the idea of attacking East Prussia.

The German High Command made a major adjustment to the strategic plan of 1915, deciding to shift the focus of the war to the Eastern Front while stabilizing the Western Front, first destroying the Russian army, ending the war on the Eastern Front, and then turning back to concentrate forces against Britain and France. At the end of January 1915, the annual plan for the German-Austrian war situation was adopted. Germany's strategic plan was to attack the Russian army from the north and south at the same time, with the German army attacking from East Prussia to Brest on the northern flank, and the German-Austrian army attacking in the direction of Lviv on the southern flank.

In order to increase their military and economic potential, Britain and France also planned to implement strategic defense on the Western Front in 1915 and only carry out some partial offensives. Therefore, it was recommended that Russia launch an offensive on the Eastern Front in order to contain the Germans from launching a powerful offensive on the Western Front. Ready for a large-scale campaign on the Eastern Front, Russia agreed to the advice of _r British and French and took on the task of attracting the main German forces. Russia's strategic plan was to attack simultaneously in two strategic directions, the North-Western Front against Germany from East Prussia and the South-Western Front against Austria-Hungary from the Carpathians.

In the battle between January ~ March 1915, the two sides won and lost each other. In January, the Austro-Hungarian 3rd and 4th armies first launched the Carpathian campaign on the southern flank. In February, the German 8th and 10th armies on the northern front also launched a powerful offensive against the Russian army. By April 1915, although the German army on the northern flank had achieved a tactical victory, it was blocked on the Grodno line and could not advance, and the intended campaign objectives were not achieved; The Austro-Hungarian army on the southern flank suffered heavy losses, and the Hungarian plain was seriously threatened by the Russian army. Faced with this situation, the German high command decided to abandon the attack on both flanks and use the center of the Russian front, that is, the Gorlice area between the Vistula and the Carpathians, as a decisive direction of assault in order to encircle and annihilate the Russian 3rd Army and prevent the Russian army from attacking Hungary.

In order to achieve its strategic intentions, the Germans continued to build up their forces on the Eastern Front. By the end of April, the German-Austrian army had concentrated a strong force between the upper Vistula and the Carpathians, forming an assault corps, consisting of 10 infantry divisions, 1 cavalry division, and hundreds of artillery pieces, which had a great advantage. The Russian army, on the other hand, lacked the necessary preparations, and the Southwestern Front had a front of 600 kilometers long and scattered forces, with only 5 infantry divisions totaling 60,000 troops and more than 100 light guns, 4 heavy guns, and 100 machine guns deployed on the 35-kilometer-wide frontal breakthrough section of the German army.

On May 1, the German-Austrian army began a long preparation for artillery fire. On 2 May, a wedge-shaped attack was launched in the town of Gorlice with superior forces. The main force of the German 11th Army, with the cooperation of the left and right flanks, broke through the frontal defense of the Russian 3rd Army on the same day. The Russian army hurriedly transferred in-depth mobile troops to reinforce, but due to sporadic battles, they were quickly annihilated by the German and Austrian armies.

By May 4, the Russian 3rd Army had been almost completely annihilated, the breakthrough was rapidly expanded, and the Russian army was forced to retreat on all fronts, and on May 14, it withdrew to the San and Transnistrian lines. The German-Austrian army took advantage of the situation to pursue and annihilate with heavy troops, and engaged in a fierce battle with the Russian army. At 17 me, the Germans captured Yarosław and crossed the river to the east. On the 23rd, Italy declared war on Austria-Hungary, and Austria-Hungary was forced to divide its forces to resist the enemy, and the offensive momentum of the German-Austrian alliance suddenly weakened. On June 15, the German-Austrian forces resumed their offensive posture, and on the 22nd captured Lviv, and the 52-day Battle of Gorlice ended in the defeat of the Russian army. At this time, Russia had very little military material left in its stockpiles, and it was in urgent need of replenishment by Britain and France.

And when Germany and Austria attacked Russia, Britain and France were not idle. In addition to pulling Italy into their chariots, sending war materiel to Russia became their top priority. Therefore, in order to open up Russia's main external route, the Black Sea straits became the primary goal.

In fact, in November 1914, British Admiral Secretary Winston Churchill proposed to use the strength of the British Navy to open the Dardanelles Strait and land, and then land in Gallipoli to take Constantinople, the capital of the Ottoman Empire, and drive Turkey out of the war. On the one hand, it relieves the pressure on the Russian Caucasus Mountain Front. The Golden Horn Sea, controlled by Constantinople, would lead directly to the Black Sea to support the Russian army in the bloody battle. And, in the hope of opening up the southern front and attacking Austria-Hungary. This idea, although strategically clever, is too difficult to implement in practice and has not been approved by the British government.

In January 1915, the British government accepted Nicholas II's request and decided to take Churchill's proposal and start a new front in the Dardanelles.

A total of 62 warships and a large number of auxiliary vessels were engaged in the campaign, and the commander of the Royal Navy's Mediterranean Fleet, General Sackville Carden, was assigned to command the campaign. The fleet began shelling the Dardanelles from February 19.

On March 18, 1915, 16 warships attempted to force their way into the narrow passage of the strait, 8 warships set off mines, and the ships retreated in a hurry. (4 more than in history)

On land, the Turkish troops, in the event of a surprise attack, abandoned their positions and retreated inland, and the British assault forces rushed to the coast without encountering resistance. By this point, the German military adviser Otto von Zanders had insight into the other side's planned Gallipoli landing and quickly mobilized his troops to the war zone. The Turkish army dug trenches and built a strong defensive system based on the complex terrain of the peninsula, and assembled artillery units in the area.

When the British and French troops were about to expand their gains, the Turkish soldiers hidden in the positions opened fire together, taking the British soldiers who were climbing the cliff by surprise.

On 3 March 1915, the first Allied landing failed, and General Carden was returned to England as a wounded.

After discovering that it was impossible to seize the Strait by relying solely on the navy, it was decided that Gallipoli must be occupied by land forces in order to gain control of the Dardanelles. The Allies hastily assembled an expeditionary force in Egypt and the Greek Islands, and 78,000 soldiers from Britain, New Zealand, Australia, India, and France arrived in the war zone. Its main force consisted of the Australian and New Zealand troops in Egypt at the time, known as the Anzac. British War Minister Heriot Kitchener appointed British Army General Ian Hamilton, known as the "Poet General", to command the campaign.

It was opposed by the newly formed Turkish Fifth Army, led by von Zanders, with 84,000 men. When the Entente expeditionary force arrived, it had been outnumbered by the other side, and the Turkish army was condescending and had an overwhelming advantage in firepower.

According to the plan, the British and Anzac troops went ashore from two different landing sites on the same day, and the British troops landed from Cape Helis. Prior to the British landing, the Anzacs landed further north on the beach near Gabatep.

On the night of April 25, 1915, after covering the fleet's artillery preparations, the Allied forces simultaneously launched a landing operation. Since most of the Anzac soldiers were not trained to land at night, and because they knew nothing about the terrain of the peninsula, they mistakenly landed at an unnamed bay north of the target (now Anzac Bay). On the same day, British and Indian forces came under heavy Turkish fire at Headland Helis. The French landed on the Dardanelles side across the Channel, but retreated the next day to join the British. Despite the establishment of a beachhead, the landing force was simply unable to effectively deploy its troops, and in fact fell into an unstable and difficult to defend foothold.

The Turkish troops, under the command of Colonel Mustafa Kemal, immediately returned fire fiercely. After a night of scuffle, heavy casualties on both sides, and the 16,000 Anzac soldiers who had landed were trapped in makeshift bunkers under Turkish artillery fire, the two sides were locked in a stalemate for the next few days.

On 1 May 1915, the Turkish army launched a major counter-offensive against one of the southernmost landing grounds of the Allied forces. During the battle, the British battleships Goliath, Triumph, and Majesty were sunk one after another. As a result, the British evacuated a large number of ships, as a result, the landing force lost naval support and also lost its firepower superiority.

From 6 to 8 May 1915, the Allied forces attacked Crimea, suffering heavy casualties and ultimately failing. On the 19th, Turkey launched a counteroffensive along the entire Anzac front. The soldier was killed in a series of suicidal charges. The Anzacs were unable to capture the intended hill target, and they were trapped in a thin position that was only 400 metres from the beach to the front line.

With the onset of summer, the uphill slopes are littered with corpses, bringing with them diseases such as dysentery, diarrhoea and intestinal fever. The Anzac soldiers on the peninsula continue to increase their non-combat attrition due to the unsuitable weather. However, in order to win this operation, the Entente deployed three more divisions of British troops to the peninsula.

At the same time, von Zanders was also gathering Turkish troops for a new offensive.

In fact, in February, the Ottomans received information that the British and French troops were planning to land at Dardanelles. However, due to the uncertainty of the time and place in this news (someone almost forgot about it), Osman did not pay attention to it. In the midst of the confusion of the Ottoman intelligence system during the war, and the news was too alarming and bold at the time, 500,000 British and French troops intended to land on Dardanelles and attack Istanbul.

Of course, these messages were provided by the Romanian king Eder behind the scenes, and he wanted to weaken the strength of Britain and France in the war, so that the two countries could not have much control over Romania after the war. In Eder's post-war plans, Romanian influence was to be had in the Balkans and Eastern Europe, both for the economy and for its national power.