The duo of Kuropatkin and Brusilov had no idea that their good days were coming to an end, and the victory within reach made them lose enough vigilance, but this is also normal, although the Chinese used 12,000 tons of crude oil to leave the French with an indelible shame in the history of the war, but it was in the closed Cam Ranh Bay, which is on a river that is the second largest in Europe, covering hundreds of kilometers of river with crude oil, which is too rich in imagination.

But they also ignored one point, Yangfeng can only transfer one oil tanker in Cam Ranh Bay, but here, the Romanians have an oil field with an annual output of more than 10 million tons, not to mention covering a Danube River, that is, covering the entire Black Sea with crude oil, for the Romanians, it is just a matter of determination, and even the output in less than half a year is basically the same.

On a dark and windy night, under the strict blockade of the army, all the oil pipelines on the crude oil terminal of the port of Jurju were opened, and the black crude oil transported from the Ploiesti oil field was continuously dumped into the Danube, and slowly went downstream along the wide river channel at a flow rate of 1.5 meters per second.

At the same time, nearly two hundred kilometers downstream, the Danube splits into two branches and does not rejoin until it is tens of kilometers downstream, and the Dro coalition still controls the island in the middle, and it is the most important link in the entire defensive line, since the railway bridge from Bucharest to Constanta leads to Guò.

But now, a train full of crude oil is stopping on the railway bridge, and then stretching out of those oil tanks one by one, and the crude oil continues to flow to the river, and soon the train loaded nearly 1,000 tons of crude oil are all poured, and then the tail locomotive starts, quickly leaving the bridge deck and heading towards the Bucharest railway station, just at the same time a second train waiting on a small station in the distance left the bridge deck and continued to pour oil.

Crude oil dumped from here. Pushed by the current, it silently went downstream.

At this time, the small city of Breira, a hundred kilometers away from here, under the cover of the gunboats of the river fleet, Russian merchant ships sailing from Sevastopol were unloading boxes of weapons and ammunition and transporting them to the Russian troops on the front line. There, nearly 50,000 Russian troops led by Brusilov were holding back the more than 100,000 Droz coalition troops led by Baron Golz, consuming millions of rounds of ammunition every day, and relying on water transportation on the Danube River for all supplies. Because of the tight capacity, the front line is always in a state of shortage of ammunition, and almost every shipload of ammunition is delivered. It will be consumed in a very short time, and it can be said that as long as a shipload of ammunition cannot be delivered, it may have an irreparable impact on the war situation.

Baron Goltz, who already knew the beginning of the plan, now stepped up his offensive, even at night, including the Romanian army attacking from the southern front, the two fronts were constantly storming the Russian lines, and he wanted to consume as much ammunition as possible before Brusilov noticed it.

Brusilov was indeed unaware. The general was now fully focused on the enemy in front and rear, and it was Kuropatkin's duty to go upstream, and he had no care about what was happening there.

But Kuropatkin, upstream, was also unaware, even though the stench of crude oil had begun to appear in the air. But in this part of Romania, such a taste is commonplace, there are large oil refineries in Bucharest, not to mention the fact that the daytime war has just ended. The smell of gunpowder smoke and poison gas still permeated the battlefield, mixed with the smell of crude oil, and it was difficult for the sleeping Russians to imagine that someone was pouring crude oil into the Danube.

Until early in the morning. The forwards of the crude oil belt had gone out for almost a hundred kilometers, and the Russian troops downstream, who were preparing to launch a new offensive, suddenly found that the Danube in front of them had turned black.

After hearing the news, Kuropatkin, who was in the Constanta Command, was stupid, he didn't expect the Germans to play like this anyway, at this time his indecisive character from a staff officer was exposed again, this guy couldn't think of how to deal with it, this is not strange, it is difficult for most people to know what to do in the face of this situation, in fact, Yang Feng himself did not think of what means to use to deal with a surging oil river.

At this time, the best way is to stop the ongoing dumping of crude oil, but the problem is that between the Russian army and the railway bridge, there is also a defense line of the Derog coalition army, even if you fire artillery bombardment here, you can't reach there, and as for blocking the crude oil belt that is constantly flowing downstream, it is even more impossible, this is the Danube, the second largest river in Europe.

But while he was at a loss there, Brusilov, who had also been informed, reacted immediately, and the commander, who was obviously much smarter than his commander, ordered a detachment of Russian troops on the east bank to run ahead of the Romanians to ignite the crude oil that was flowing downstream, thus blocking its further flow downstream. But it is a pity that he failed, at this time, because of the problem of quantity, especially the impact of the current at the confluence, the crude oil on the river surface is far from forming a large area of coverage, just some intermittent mottled oil stains, although they can ignite, but they cannot form a continuous fire.

Not to mention the fact that the river below flowed, and the flames on the surface of the river flowed, and under the desperate gaze of the Russians, the flowing Danube, with its burning flames, advanced slowly and inexorably, and soon reached Breira.

The Russian merchant ships and the gunboats of the river flotilla that were here looked at the flaming river that was crashing head-on into them, and they turned around and ran away without hesitation, the flames on the river did not stop, but continued to follow the fleeing fleet slowly, and continued to move forward little by little, and as the downstream river became more and more gentle, the crude oil belt, which was originally broken and not easy to form a fire, began to slowly converge, and the fire also became bigger and bigger, and finally it had completed the formation of a burning wall of fire, firmly blocking the Danube, And the wall of fire continues to expand as it moves downstream.

Brusilov did not hesitate to order the entire line to retreat, abandon all supplies, abandon their vital line of defense, and withdraw the whole army to the east bank of the Danube, regardless of whether there are bridges or not, ferries, even if they swim with wooden planks, they must also take advantage of the fact that the fire has not completely blocked the retreat, and all withdraw to the east bank to join the main force led by Kuropatkin, otherwise there will be more and more crude oil on the river, and then the fire will completely block his army on the west bank, and in the absence of supplies, He is in danger of being annihilated from both sides.

This guy's decision saved his 50,000 troops, of course, not all, the Romanian army that originally attacked from the south to the north and the German army that attacked from the north to the south would definitely not let him leave so easily at this time, and Brusilov, who was attacked by the enemy on his back, had to leave a division to be responsible for blocking the attack with a strong man, and then swam the Danube with the remnants and then quickly went south to join the main force.

He escaped alive, but Kuropatkin upstream, who came to his senses, immediately ordered another assault on the opposite side, trying to break through the line of defense on the west bank of the Danube branch of the Dro coalition without crude oil, and then to the west to seize the railway bridge where the crude oil was being dumped, and if not to capture it, so that the artillery could reach there and prevent the Romanians from continuing to pour oil.

It's a pity that his attack still hasn't succeeded, it's not surprising, he has been attacking for almost a week and has not succeeded, naturally this time it's difficult to succeed, this is not the most unlucky, the unfortunate thing is that his hundreds of thousands of troops are sacrificing their lives to attack the opposite bank, the crude oil that came down from the upstream arrived, although it also did not form a continuous crude oil belt, but those mottled oil blocks were ignited by the firepower of the warring parties and still frightened the charging Russian army on the river to turn around and run.

However, at least one division has landed on the west bank, and the Russian army, which is playing a white-knuckle battle with the Dro coalition army, has not been able to withdraw, and their location is exactly a river bay, and the blocked crude oil has formed a wall of fire hundreds of meters wide and two kilometers long behind them, completely blocking their retreat, and these Russian troops who have no way to retreat simply dropped their weapons and surrendered.

The surging black crude oil completely changed the situation of the war in Romania, a burning river, so that the Russians' expectation of breaking through the Danube defense line has become an unattainable dream, and this dream will be forever unattainable, as long as the Droz coalition army is willing, they can pour crude oil into the Danube at any time, they have a large oil field with an annual output of more than 10 million tons behind them, they can pour as much as they want, pour as much as they want, pour when they want, even if the Danube River turns black forever, it is nothing more than pumping more oil wells.

That is to say, as long as the Ploiesti oil field never stops production, the Russians will never expect to break through the Danube defense line, but if they can't break through this line, they will never expect to stop the production of the Ploiesti oil field, which is another endless cycle, and the Russians are suddenly in a predicament. And their troubles did not stop there, soon they had to face the aftermath of the reversal of the tide of the war, Nikolai had drained all his mobile forces for this battle, and when Kuropatkin led his entire two army groups, across the fire on the east bank of the Danube, and saw the German and Austro-Hungarian reinforcements arrive one by one, the German-Austrian troops on other fronts would not miss such a good opportunity, especially the German army, which had been maintaining an offensive posture in East Prussia. (To be continued......)