United States and European authorities had a busy day.

According to a report from Reuters, government authorities swept through multiple countries on Thursday, shutting down hundreds of “dark websites” that traded in drugs, weapons, murders-for-hire, child pornography, and more. One of those was Silk Road 2.0, a well-known site where online criminals can sell drugs, solicit computer hacking, partake in money laundering, and commit several other crimes.

A year ago, the Feds took down the original Silk Road, an internet Black Market where users could purchase all manner of illicit goods and services with the anonymous digital currency, Bitcoin. In addition to shutting down the website, the government also arrested Ross Ulbrecht, the supposed ringleader of the whole operation. The 29-year-old Ulbrech had allegedly managed the entire Silk Road community under the online handle, “Dread Pirate Roberts.”

Taking down Silk Road was a triumphant moment for Federal authorities, but one that was short-lived when a new ringleader launched Silk Road 2.0 to carry on the same types of transactions. Clearly, though, authorities were undaunted by the return of Silk Road. Instead, they used the return of the site as a reason to declare war on an entire breed of criminal websites.

The result was Thursday’s coordinated attack, in which U.S. and European authorities reportedly took down more than 400 internet domains used to sell illicit goods and services. The attack spanned 18 countries, bagged 16 cyber-criminals (including the suspected leader of Silk Road 2.0), and led to the seizure of more than $1 million worth of Bitcoin. Authorities also recovered narcotics, silver, gold, and cash.

Unfortunately, as big of a day as Thursday was for the war on cybercrime, no one is going to start ringing the victory bells just yet. Even though the sweeping operation more or less cut the legs off of illegal online black-market trading, that particular monster is a Hydra that will quickly grow back as many heads as it just lost. Whether the next site is Silk Road 3.0 or something entirely new, this will not be the end of illegal online trading.