It happened in November 2018. The US cyber command conducted cyber attacks against the St. Petersburg Internet Research Agency (the so-called troll factory), blocking its employees from accessing the Internet, The Washington Post reports.
It was the first offensive operation of this kind against Russia, the newspaper notes.
The attack began on Congress election day and continued for several days until the end of the vote count.
The Pentagon thus wanted to make it impossible to conduct a propaganda campaign that would cast doubt on the election results.
Since October 2018, the United States have also sent messages threatening the Internet Research Agency staff and hackers who collaborate with the GRU. E-mails and messages claimed that Americans knew their real names.