乌克兰斯洛维扬斯克-乌克兰东部的前线正在发生重大变化，俄罗斯和乌克兰正在巴赫穆特及其周边地区开展进攻行动。
市内的俄罗斯军队取得了进一步的进展，并声称已经完全控制了每个地区。
乌克兰声称其军队仍在该市西部边缘的一个小区域作战。
与此同时，巴赫穆特以外的局势是动态的，乌克兰部队报告说，在该市的北部和南部进行了反攻。
本周末，美国广播公司新闻被允许进入乌克兰东部一个秘密地点的军事指挥中心。
我们的团队观看了多个屏幕，显示乌克兰东部战场上的无人机直播，乌克兰在巴赫穆特附近进行了实时反击。
可以看到乌克兰士兵正在清理俄罗斯阵地。死亡的俄罗斯士兵还出现在几个直播视频中的一个上，这些视频由乌克兰士兵监控。
那次行动发生在周六上午，是乌克兰军队最近几天在巴赫穆特附近发动的一系列袭击之一。
乌克兰军方官员在乌克兰东部靠近前线的一个秘密地点的军事指挥中心内，通过无人机监控战场。
美国广播公司新闻
至关重要的是，乌克兰声称已经控制了该市附近的高地，这可能为进一步的攻击提供重要优势。
上周，一名乌克兰指挥官承诺，该地区将很快采取更多的进攻行动，他的营在巴赫穆特以南的行动中担任先锋。
这位代号为“Rolo”的军官指挥着乌克兰第三突击旅第一突击营的多达700人，该旅已经在巴赫穆特及其周边地区活动了几个月。
他告诉美国广播公司新闻，他的士兵在上周三清晨袭击了俄罗斯阵地，声称到周四，他的士兵已经占领了半平方英里的土地，并杀死了大约50名俄罗斯士兵。美国广播公司新闻无法证实他的说法。
“我们打败了他们，”他在乌克兰东部的一个地下室接受采访时说。
该指挥官不愿评论乌克兰在巴赫穆特附近的行动是否是乌克兰军队更大规模反攻的前兆。
“小步骤导致大结果，”他笑着说。
“如果你问我，我们应该期待更多吗?是的，我们应该。如果你问我在哪里，那是机密。但你会看到它，”指挥官说，并补充说，新的西方武器正在渗透到战场上。
“我们现在有了发起者。我们决定规则，”他吹嘘道。“现在敌人必须适应我们的行动，并根据我们的行动采取行动。”
美国广播公司新闻还展示了两辆严重受损的美国供应的M113装甲运兵车。据乌克兰第一突击旅称，他们在周三和周四的行动中被用于巴赫穆特南部。
回到隐藏在乌克兰东部顿巴斯一栋不起眼的建筑中的军事指挥中心，无人机画面显示巴赫穆特上空升起浓烟。
美国广播公司新闻无法在直播视频中看到这座城市中没有严重受损的建筑。
大多数将现场前线图像反馈到指挥中心士兵监控的屏幕上的无人机都是商业无人机，可以在网上购买，尽管许多商业无人机被修改携带和投掷手榴弹。
该中心的指挥官来自乌克兰的亚当战术小组(Adam Tactical Group)，耶夫亨·梅泽维金(Yevhen Mezhevikin)表示，前线沿线“各个方向”的乌克兰部队都准备好了“随时”发起大规模反攻。
他推测，乌克兰未来反攻的方向已经由乌克兰高级将领“选定”，但仍处于绝密状态，他表示对乌克兰的机会充满信心。
他告诉美国广播公司新闻，乌克兰军队在战争早期经历了成功的反击，并认为这将给他们一个重要的优势。
“我确信我们能够在前线突破敌人的防御，敌人不会得逞，”他在一次采访中说。
医务人员在预期的反攻前做好准备
乌克兰东部顿巴斯一家野战医院的医生和医务人员也在为乌克兰发动更大规模进攻时不可避免的伤亡人数激增做准备。
“这将是困难的，我们将会有[更多的]伤亡，”前线附近军事医疗设施的首席医生Oleh Tokarchuk博士告诉ABC新闻。
“我们将失去我们的亲人和朋友，但我相信我们能够做到这一点，”他说。
在大约90分钟的时间里，四名受伤的士兵被军用救护车从前线阵地带回野战医院接受治疗。
据医务人员说，这些士兵是被俄罗斯大炮击中的坦克乘员的一部分。
其中一名男子腿部被弹片严重击伤。另一个名叫瓦西里(Vasily)的人没有透露姓氏，他的手臂受了轻伤。
“一枚炮弹落了下来，我们中的一些人试图躲避，一些人没有，”他说，看起来明显受到了惊吓，但承诺一旦康复，他将返回前线。
托卡尔丘克说，自从今年早些时候俄罗斯占领巴赫穆特附近的索莱达镇以来，抵达他的设施的伤亡人数已经显著减少。
然而，他说，一旦乌克兰开始大规模反攻，他的团队已经做好了改变的准备。
“这不是火箭科学，”奥列赫·潘基夫说，他是医院的一名志愿者，帮助将伤员撤离战区。
“当你进行突击行动时，你总是会有更多的受伤人员。但是我们能怎么办呢?”他问。
“我们需要坚持自己的立场。我们需要与侵略者作战。当然，我们需要保卫我们的国家。”
Ukraine's eastern front lines shifting ahead of major offensive
SLOVYANSK, Ukraine --The front lines in eastern Ukraine are shifting in significant ways, with Russia and Ukraine carrying out offensive operations in and around Bakhmut.
Russian forces inside the city have made further advances and claim to have full control of every district.
Ukraine claims its forces are still fighting in a small area in the western fringe of the city.
Meanwhile, the situation outside Bakhmut is dynamic, with Ukrainian forces reporting a counteroffensive to the north and south of the city.
ABC News was allowed inside a military command center this weekend at an undisclosed location in eastern Ukraine.
Our team watched multiple screens showing live drone feeds down onto the battlefield in eastern Ukraine as a Ukrainian counteroffensive played out in real time near Bakhmut.
Ukrainian soldiers could be seen clearing Russian positions. Dead Russian soldiers were also visible on one of several live video feeds, which are monitored by Ukrainian soldiers.
That operation, which took place on Saturday morning, was one of a series of assaults by Ukrainian forces near Bakhmut in recent days.
Crucially, Ukraine claims it has taken control of higher ground near the city, which could give an important advantage for further attacks.
A Ukrainian commander whose battalion spearheaded an operation south of Bakhmut last week promised there would be more offensive action soon in the area.
The officer, who goes by his callsign "Rolo," commands as many as 700 men in the 1st Assault Battalion of Ukraine's 3rd Assault Brigade, which has been operating in and around Bakhmut for several months.
He told ABC News his men stormed Russian positions early in the morning last Wednesday, claiming that, by Thursday, his men had taken half a square mile of land and killed around 50 Russian soldiers. ABC News cannot verify his claims.
"We outplayed them," he said in an interview in a basement in eastern Ukraine.
The commander would not comment on whether the Ukrainian operation near Bakhmut was the precursor to a more significant counteroffensive by Ukrainian forces.
"Small steps lead to big results," he said with a smile.
"If you ask me, should we expect more? Yes, we should. If you ask me where, that's confidential. But you shall see it," the commander said, adding that new Western weaponry was filtering through to the battlefield.
"We have the initiate now. We dictate the rules," he boasted. "Now the enemy has to adjust to what we're doing and act according to our actions."
ABC News was also shown two US-supplied M113 armored personnel carriers which were badly damaged. According to Ukraine's 1st Assault Brigade they were used in the operation on Wednesday and Thursday to the south of Bakhmut.
Back at the military command center hidden in a nondescript building in Ukraine's eastern Donbas, the drone feed showed smoke rising over Bakhmut.
ABC News was unable to spot a building in the city on the live video feed which had not been badly damaged.
Most of the drones feeding the live front-line images back to the screens monitored by soldiers at the command center were commercial drones which can be purchased online, although many of the commercial dronesare modifiedto carry and drop grenades.
The commander at the center, from Ukraine's Adam Tactical Group, Yevhen Mezhevikin, said Ukrainian forces "in every direction" along the front line were ready to go on a major counteroffensive "at any moment."
Speculating that the directions of a future Ukrainian counteroffensive had "already been chosen" by top Ukrainian generals, but were still being kept top secret, he said he was confident about Ukraine's chances.
He told ABC News that Ukrainian troops experienced successful counteroffensives earlier in the war, and argued that would give them an important edge.
"I'm sure we'll be able to break through enemy defenses on the front line and the enemy will have no success," he said in an interview.
Medics prepare ahead of expected counteroffensive
Doctors and medics at a military field hospital in Ukraine's eastern Donbas are also preparing for an inevitable spike in casualties when Ukraine launches a larger offensive.
"It is going to be difficult and we're going to have [an increase in] casualties," Dr Oleh Tokarchuk, the lead doctor at the military medical facility, near to the front lines, told ABC News.
"We're going to be losing our loved ones and friends but I believe we will be able to make it," he said.
Four wounded soldiers were brought back from front-line positions in military ambulances to receive treatment at the field hospital, in the roughly 90 minute period ABC News was there.
The soldiers were, according to medics, part of a tank crew which had been hit by Russian artillery.
One of the men had a serious shrapnel wound to his leg. Another, Vasily, who did not give his surname, had a minor injury to his arm.
"An artillery shell landed, some of us tried to take cover, some didn't," he said, looking visibly shaken but promising to return to the front lines once he has recovered.
Tokarchuk said the number of casualties arriving at his facility had significantly reduced since the early months of this year when Russia captured the town of Soledar, near to Bakhmut.
However, he said, his team were ready and prepared for that to change once a major Ukrainian counteroffensive gets underway.
"This is not rocket science," said Oleh Pankiv, a volunteer at the hospital who helps evacuate medical casualties away from the battle zone.
"When you have assault operations, you will always have many more injured people. But what can we do?" he asked.
"We need to stand our ground. We need to fight against the aggressor. And of course, we need to defend our country."
