Ukrainian President Volodymyr Zelenskyy engaged in discussions on Sunday with German leaders during his inaugural visit to the country following last year's Russian incursion.
Berlin provided resolute backing through the provision of an extensive military package.
"Weapons. Powerful package. Air defense. Reconstruction. EU. NATO. Security," Zelenskyy wrote on Twitter.
Zelenskyy's trip comes as Kyiv prepares a much-anticipated counteroffensive and follows a day of meetings in Rome with Italian leaders and Pope Francis.
Ukrainian forces have been training troops and stockpiling Western-supplied munitions and hardware that analysts say will be key to reclaiming territory captured by Russia.
Once accused of reticence in supplying military gear to Ukraine, Germany has significantly contributed to tanks, rockets and anti-missile systems.
President Frank-Walter Steinmeier greeted Zelenskyy at the Bellevue Palace, where he signed the guestbook before the pair headed into talks.
The Ukrainian leader met Chancellor Olaf Scholz, who greeted him with military honors.
He is also expected to head to the western German city of Aachen, which this year is awarding him and the Ukrainian people the Charlemagne prize – an honor awarded for efforts to foster European unity.
Bild Daily said the air force would secure Zelenskyy's flight to Aachen on a German government plane.
Scholz, European Commission President Ursula von der Leyen and Polish Prime Minister Mateusz Morawiecki are due to attend the ceremony in Aachen.
A meeting with the European leaders could help prepare the ground for an EU summit in Reykjavik next Tuesday, followed by the International Group of Seven gathering of world leaders in Hiroshima, Japan.
Zelenskyy's visit rounds off over a year of choppy relations with Germany, now one of Ukraine's biggest armaments suppliers, but only after much pressure from Kyiv.
In an apparent show of its backing for Kyiv, Berlin said it would send Ukraine more firing units and launchers for the Iris-T anti-missile system, 30 additional Leopard 1 tanks, more than 100 armored combat vehicles, and over 200 surveillance drones.
"We all hope for a rapid end to this terrible war by Russia against the Ukrainian people, but unfortunately, this is not in sight," Defense Minister Boris Pistorius said in a statement.
"This is why Germany will supply all the help that it can, for as long as necessary," he said.
Mykhaylo Podolyak, an adviser to Zelenskyy, hailed the announcement, saying it indicated that Russia was "bound to lose and sit on the bench of historical shame."
Early in the conflict, Kyiv accused Germany of being too accommodating to Russian President Vladimir Putin, while Berlin's reliance on Russian energy proved tricky.
Kyiv had also snubbed a visit by Steinmeier in the weeks following the invasion, which delayed Scholz's first trip to the war-torn country.
Both Steinmeier and Scholz have since visited Ukraine.
As Kyiv prepares its offensive to retake ground in the eastern Donetsk and Lugansk regions and the Kherson and Zaporizhzhia regions in the south, Germany's continued military backing will likely prove vital.
High-tech German-made Leopard 2A6 tanks sought by Kyiv have already been put to use at the front lines, Bundeswehr chief Carsten Breuer confirmed during his recent trip to Ukraine.
The medium-range Iris-T missile defense system from Germany is also helping to bolster Ukraine's protection against Russian strikes, Kyiv has said.
Both sides claimed to be making progress on the front line near the eastern flashpoint town of Bakhmut.
"Our soldiers are moving forward in some areas of the front, and the enemy is losing equipment and manpower," commander of the Ukrainian ground forces Oleksandr Syrskyi said on social media on Saturday.
Russia said its forces were still pushing inside Bakhmut.
"In the Donetsk direction, assault detachments liberated a block in the northwestern part of the city of Artemovsk," the defense ministry said, referring to Bakhmut by its Russian name.
Western allies have delivered increasingly powerful weapons to Ukraine. Britain this week announced it was sending Storm Shadow missiles, becoming the first country to send longer-range arms to Kyiv.
Russia described it as "an extremely hostile step" and on Saturday accused Kyiv of using the British missiles to target civilian sites in eastern Ukraine, wounding six children.
In Rome, Zelenskyy said he discussed with Pope Francis the fate of "tens of thousands of children" that Kyiv says were deported to Russia, as well as his plans for peace.
Zelenskyy also thanked Italy's Prime Minister Giorgia Meloni "for helping to save lives."
"I am convinced that Ukraine will win and be reborn stronger, more proud and more prosperous than before," said Meloni in response.
