The removing of Ukraine’s minister of protection after a flurry of experiences of graft and monetary mismanagement in his division underscores a pivotal problem for President Volodymyr Zelensky’s wartime management: stamping out the corruption that had been widespread in Ukraine for years.

Official corruption was a subject that had been principally taboo all through the primary yr of the conflict, as Ukrainians rallied round their authorities in a battle for nationwide survival. But Mr. Zelensky’s announcement Sunday evening that he was changing the protection minister, Oleksii Reznikov, elevated the problem to the very best stage of Ukrainian politics.

It comes at a pivotal second within the conflict, as Ukraine prosecutes a counteroffensive within the nation’s south and east that depends closely on Western allies for navy help. These allies have, for the reason that starting of the conflict, pressured Mr. Zelensky’s authorities to make sure that Ukrainian officers weren’t siphoning off a few of the billions of {dollars} in support that was flowing into Kyiv.

Just final week, the United States’s nationwide safety adviser, Jake Sullivan, met with three high-ranking Ukrainian officers to debate efforts to stamp out wartime corruption. It comes as some lawmakers within the United States have used graft as an argument for limiting navy support to Ukraine.

Mr. Zelensky has responded to the strain from allies and criticism at house with a flurry of anticorruption initiatives, not all of them welcomed by consultants on authorities transparency. The most controversial has been a proposal to make use of martial legislation powers to punish corruption as treason.

Mr. Reznikov, who has held a variety of positions throughout Mr. Zelensky’s tenure, submitted his resignation Monday morning. He has not been personally implicated within the allegations of mismanaged navy contracts. But the widening investigations at his ministry posed a primary important problem for the federal government on anti-corruption measures for the reason that begin of Russia’s full-scale invasion.

“The question here is, ‘Where is the money?’” mentioned Daria Kaleniuk, the chief director of the Anti-Corruption Action Center in Ukraine, a bunch devoted to rooting out public graft that’s now centered on conflict profiteering.

“Corruption can kill,” Ms. Kaleniuk mentioned. “Depending on how effective we are in guarding the public funds, the soldier will either have a weapon or not have a weapon.”

At one level this yr, about $980 million in weapons contracts had missed their supply dates, in accordance with authorities figures, and a few prepayments for weapons had vanished into oversees accounts of weapons sellers, in accordance with experiences made to Parliament. Though exact particulars haven’t emerged, the irregularities recommend that procurement officers within the ministry didn’t vet suppliers, or allowed weapons sellers to stroll off with cash with out delivering the armaments.

Ukrainian media experiences have pointed to overpayments for primary provides for the military, comparable to meals and winter coats.

The public revelations of mismanagement thus far haven’t immediately touched international weapons transferred to the Ukrainian Army, or Western support cash, however they’re nonetheless piercing the sense of unquestioning assist for the federal government that Ukrainians had exhibited all through the primary yr of Russia’s full-scale invasion.

Two officers with the Defense Ministry — a deputy minister and the pinnacle of procurement — have been arrested through the winter over the experiences of the acquisition of overpriced eggs for the military. Mr. Zelensky fired the heads of navy recruitment workplaces final month after allegations emerged that some took bribes from individuals looking for to keep away from the draft.

His proposed initiative to deal with corruption as treason set off a wave of criticism that it may result in an abuse of martial legislation powers.

Oleksii Goncharenko, a member of Parliament within the opposition European Solidarity celebration, mentioned of Mr. Zelensky’s document, “I cannot praise his efforts in fighting corruption during the war period.”

Government officers acknowledge that some navy contracts failed to supply weaponry or ammunition, and that some cash has vanished. But they are saying that many of the issues arose within the chaotic early months of the invasion final yr and have since been remedied.

Mr. Reznikov, the departing protection minister, mentioned final week that he was assured the ministry would return prepayments to suppliers which have gone lacking.

Military spending now accounts for practically half of Ukraine’s nationwide finances, and the experiences of contracting scandals level to a shift within the sources of public corruption.

Before the full-scale invasion, the first supply of embezzlement had been poorly run state corporations, of which there have been greater than 3,000 on the federal government’s steadiness sheet. Money was siphoned off by myriad schemes by rich insiders, whereas the nationwide finances, propped up by international support, absorbed the losses.

Anticorruption teams say the massive influxes of funds to assist the conflict has prompted them to shift their focus to navy spending.

Ukrainian investigative journalists have highlighted overpayment for primary provides for the military, like eggs for 17 hryvnia, or 47 cents, every — far above prevailing costs, in accordance with a report in Dzerkalo Tyzhnia, a Ukrainian newspaper. Canned beans have been purchased from Turkey at greater than the value for a similar cans in Ukrainian supermarkets, the newspaper reported, regardless that the navy could be anticipated to buy at lower than retail costs.

The ministry additionally purchased 1000’s of coats that turned out to be insufficiently insulated for Ukraine’s bitter winters.

Western donors are intently watching how Ukraine tackles the issue, the chairwoman of the Ukrainian Parliament’s anticorruption committee, Anastasia Radina, mentioned in an interview.

Particularly worrying is the proposal to punish corruption as treason as a result of it may enable the home intelligence company, the S.B.U., which is underneath direct management of the president, to analyze official corruption.

The assembly final week with Mr. Sullivan, the American nationwide safety adviser, included the heads of a specialised investigative company, a prosecutorial workplace and a court docket that have been arrange after Ukraine’s Western political pivot in 2014, with assist from the United States and worldwide lenders such because the International Monetary Fund. These are the Ukrainian businesses that might lose energy underneath Mr. Zelensky’s treason proposal.

Western governments are cautious of the businesses’ potential weakening, Ms. Radina mentioned, including that if the proposal goes ahead, “most likely they will object.”

But, general, Ms. Radina, a member of Mr. Zelensky’s governing Servant of the People celebration, defended the federal government’s efforts to fend off graft in wartime.

The arrest this previous weekend of Ihor Kolomoisky, considered one of Ukraine’s richest males, was seen as an indication of the drive to curb oligarchs’ political affect. Suspected of fraud and cash laundering, Mr. Kolomoisky supported Mr. Zelensky’s 2019 election marketing campaign, however for the reason that conflict started, the president has appeared to interrupt all ties with him.

In different crackdowns this yr, investigators pursued considered one of their highest-profile prosecutions ever for bribery, towards the chief of Ukraine’s Supreme Court, who was ousted and arrested in May. In addition, a deputy economic system minister is on trial, accused of embezzling from humanitarian support funds.

That high-level circumstances of corruption are coming to mild is constructive, mentioned Andrii Borovyk, director of Transparency International in Ukraine, somewhat than a sign of a nation slowed down by insider dealing; it reveals that the nation can battle the conflict and graft on the identical time, he mentioned.

“Scandals are good,” he mentioned. “The war,” Mr. Borovyk added, “cannot be an excuse to stop fighting corruption.”