President Zelensky has stated that Ukraine's partners in Europe have not given him sound guarantees that they will protect his country in the case of a new Russian aggression.
"I am asking this very question to every one of our allies and thus far, the answer remains elusive a clear, unambiguous answer yet," he told reporters on midweek.
These remarks follow a day after the UK and France inked a statement of purpose on deploying troops in Ukraine if a peace deal to end the war with Russia is agreed.
However, full security guarantees have not been agreed. The United States, which has been leading efforts to halt the offensive, was reported to have abstained from signing such a pledge at discussions held in the French capital on the previous day.
Following the negotiations in Paris, which involved some three dozen nations that form the so-called Coalition of the Willing, UK Prime Minister Sir Keir Starmer said the two nations would "establish military hubs across Ukraine" to deter future invasion, while French President Emmanuel Macron subsequently indicated thousands of troops may be deployed.
Partner nations suggested that the US would assume a leading role in monitoring a truce. But the central sticking point of territorial concessions that Ukraine is being pressured to offer to Russia as part of the peace proposals are continuing to be negotiated.
Moscow has thus far remained silent on the announcement made in the French capital.
President Putin launched a comprehensive military assault of Ukraine in the early months of 2022, and Moscow currently controls about 20% of Ukraine's land.
The UK Prime Minister characterized the joint statement as "a vital part of our dedication to stand with Ukraine for the foreseeable future".
He continued: "It paves the way for the juridical structure under which British, French and partner forces could operate on Ukraine's territory, protecting Ukrainian airspace and waters, and regenerating Ukraine's armed forces for the future."
Zelensky hailed that agreement as a "significant leap of progress".
A day later, however, he appeared less optimistic.
"I perceive the determination, the political will, and that the partners are ready, and the partners are ready to give us robust economic measures, strong security guarantees," he said when questioned if European countries would defend Ukraine.
"However, until we don't have such security guarantees - formally ratified, endorsed by legislatures, supported by the United States Congress - this crucial issue cannot be answered. And even if they do, you must ultimately depend primarily on your own strength."
Negotiations in Paris were also notable due to the attendance of US President Donald Trump's peace envoys, Steve Witkoff and Jared Kushner.
One envoy stated the allies "largely finished" their work on agreeing security protocols.
Recently, the President indicated a peace deal was "90% ready".
Territorial concessions and security guarantees have been at the center of outstanding matters for diplomats.
Putin has repeatedly warned that Ukraine's military must withdraw from all of Ukraine's eastern Donbas or Moscow will take control, dismissing potential concessions over how to end the war.
The Ukrainian President has thus far rejected ceding any territory, but has proposed that Ukraine could redeploy its forces to an agreed point - but provided that Russia did the same.
Moscow now holds about 75% of the Donetsk oblast, and some nearly all of the adjacent Luhansk region. The two regions form the Donbas industrial heartland.
It has been intensifying attacks against cities in Ukraine - with a focus on power facilities. Moscow is also achieving incremental advances in capturing more Ukrainian territory.
Ukrainian forces have retaliated at objectives inside Russia with unmanned aerial vehicles, though with more limited success.
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