The Ukrainian Security Service (SBU) reported that the June 1 “Spider Web” drone operation caused approximately $7 billion in damages and disabled 34% of cruise missile bombers in key Russian airbases.

The agency confirmed that more details about the attack will be revealed later.

“And you thought Ukraine was easy? Ukraine is exceptional. Ukraine is unique. All the steamrollers of history have rolled over it. It has withstood every kind of trial. It is tempered by the highest degree. In today’s world, its value is beyond measure,” the SBU wrote, quoting Ukrainian poet Lina Kostenko.

They also vowed to continue to drive Russian forces out of Ukrainian territory.