The U.S. will send 31 M1 Abrams battle tanks to Ukraine, senior administration officials said Wednesday, reversing months of persistent arguments by the Biden administration that the tanks were too difficult for Ukrainian troops to operate and maintain. The U.S. decision came on the heels of Germany agreeing to send 14 Leopard 2 A6 tanks from its own stocks. Germany had said the Leopards would not be sent unless the U.S. put its Abrams on the table, not wanting to incur Russia's wrath without the U.S. similarly committing its own tanks. Since then, both sides had participated in "good diplomatic conversations” that had made the difference and were part of the “extraordinary shift in Germany’s security policy" over providing weapons to Ukraine since Russia invaded 11 months ago, said a senior administration official, who briefed reporters Wednesday on the condition of anonymity to describe the new tank package in advance of the announcement. The $400 million package announced Wednesday also includes eight M88 recovery vehicles — tank-like tracked vehicles that can tow the Abrams if it gets stuck. Altogether, France, the U.K., the U.S., Poland, Germany, the Netherlands and Sweden will send hundreds of tanks and heavy armored vehicles to fortify Ukraine as it enters a new phase of the war and attempts to break through entrenched Russian lines. But there were few answers about what U.S. tanks would be sent — whether they would be pulled from the existing stockpile of more than 4,000 Abrams and retrofitted, or whether the U.S. would use the Ukraine Security Assistance Initiative to buy new systems to possibly backfill allies who send their own or buy new systems outright for Ukraine. Read more: In reversal, US poised to approve Abrams tanks for Ukraine Either way, using the assistance initiative funding route means that while Abrams have now been promised to Ukraine, it will likely be many months before the tanks are actually on the battlefield, and not in time for Russia's anticipated spring offensive. Russian Ambassador to Germany Sergey Nechayev on Wednesday called Berlin’s decision to send Leopard 2 tanks to Ukraine “extremely dangerous.” Nechayev said in an online statement that the move “shifts the conflict to a new level of confrontation and contradicts the statements of German politicians about their reluctance to get involved in it.” “We’re seeing yet again that Germany, as well as its closest allies, is not interested in a diplomatic resolution of the Ukraine crisis, it is determined to permanently escalate it and to indefinitely pump the Kyiv regime full of new lethal weapons,” the statement read. Until now, the U.S. has resisted providing its own M1 Abrams tanks to Ukraine, citing extensive and complex maintenance and logistical challenges with the high-tech vehicles. Washington believes it would be more productive to send German Leopards since many allies have them and Ukrainian troops would need less training than on the more difficult Abrams. Just last week, Under Secretary of Defense for Policy Colin Kahl told reporters that the Abrams is a complicated, expensive, difficult to maintain and hard to train on piece of equipment. One thing Defense Secretary Lloyd Austin has been very focused on, he said, “is that we should not be providing the Ukrainians systems they can’t repair, they can’t sustain, and that they, over the long term, can’t afford, because it’s not helpful.” Read more: Germany says it won't block Poland giving Ukraine tanks For the Abrams to be effective in Ukraine, its forces will require extensive training on combined arms manuevuer — how the tanks operate together on the battlefield, and on how to maintain and support the complex, 70-ton weapon. The Abrams tanks use a turbine jet engine to propel themselves that burns through at least two gallons a mile regardless of whether they are moving or idling, which means that a network of fuel trucks is needed to keep the line moving.

In what would be a reversal, the Biden administration is poised to approve sending M1 Abrams tanks to Ukraine, U.S. officials said Tuesday, as international reluctance to send tanks to the battlefront against the Russians begins to erode. The decision could be announced as soon as Wednesday, though it could take months or years for the tanks to be delivered. U.S. officials said details are still being worked out. One official said the tanks would be bought under an upcoming Ukraine Security Assistance Initiative package, which provides longer-range funding for weapons and equipment to be purchased from commercial vendors. The U.S. announcement is expected to come on Wednesday in coordination with an announcement by Germany that it will approve Poland’s request to transfer German-made Leopard 2 tanks to Ukraine, according to one official. The officials spoke on condition of anonymity because the decision has not yet been made public. By agreeing to send the Abrams at an as-yet unspecified time under the assistance initiative, the administration is able to meet German Chancellor Olaf Scholz's demand for an American commitment without having to send the tanks immediately. Weapons provided through the assistance initiative can take many months to several years to reach the battlefield. Much of the aid sent so far in the 11-month-old war has been through a separate program drawing on Pentagon stocks to get weapons more quickly to Ukraine. But even under that program, it would take months to get tanks to Ukraine and to get Ukrainian forces trained on them. It's unknown how many tanks would be approved. Until now, the U.S. has resisted providing its own M1 Abrams tanks to Ukraine, citing extensive and complex maintenance and logistical challenges with the high-tech vehicles. Washington believes it would be more productive to send German Leopards since many allies have them and Ukrainian troops would need less training than on the more difficult Abrams. A U.S. official familiar with White House thinking said the administration’s initial hesitancy was based on concerns about the requisite training and the sustainment of the tanks. The official added that the administration believes that such plans are now in place, but it could take time to implement them. Read more: Defense leaders meet amid dissent over tanks for Ukraine At the Pentagon, spokesman Brig. Gen. Pat Ryder said he had nothing to announce on any U.S. decision regarding Abrams tanks. But he said, “anytime that we’ve provided Ukraine with a type of system, we’ve provided the training and sustainment capabilities with that.” The administration's reversal comes just days after a coalition of more than 50 senior defense officials from Europe and beyond met in Germany to discuss Ukraine’s war needs, and battle tanks were a prime topic. Ukrainian leaders have been urgently requesting tanks, but Germany had resisted mounting pressure either to supply its own tanks or clear the way for other countries, such as Poland, to send the German-made tanks from their own stocks. Kremlin spokesman Dmitry Peskov said the deployment of Western tanks would trigger “unambiguously negative” consequences. Defense leaders from the countries that have Leopard 2 tanks met with the Germans during the Friday conference at Ramstein Air Base in an effort to hammer out an agreement. On Sunday, Berlin indicated it wouldn’t stand in the way if other countries wanted to send the Leopard 2 tanks to Kyiv. Germany needs to agree for the tanks to be given to Ukraine, which is not a member of NATO. U.S. and German officials have given mixed signals about whether the U.S. and German decisions are linked, and whether Berlin was hesitant to send its tanks unless the U.S. sent Abrams. Polish Defense Minister Mariusz Błaszczak said Tuesday that Poland has officially requested permission from Germany to transfer its Leopard 2 battle tanks to Ukraine. Read more: Poland asks Berlin to OK Ukraine tanks; Kyiv targets graft German officials confirmed to the dpa news agency they had received the application and said it would be assessed “with due urgency.” German Foreign Minister Annalena Baerbock said Sunday that Berlin wouldn’t seek to stop Poland from providing the high-tech armor to Kyiv. Lawmakers in Congress have also been pushing the U.S. to beef up its aid to Ukraine. Senate Republican leader Mitch McConnell said Tuesday “it’s time, past time” for the Biden administration and allies to send more military aid to Ukraine, and that the U.S. must provide more tanks and weapons to help Ukraine “win this war.” “It’s time, past time, for the Biden administration and our allies to get serious about helping Ukraine finish the job and retake their country.” The likely plans to send the Abrams were first reported by The Wall Street Journal.