Nearly 400 people who were either wounded while serving in the U.S. military in Afghanistan or are family members of service members who died in the conflict sued a group of companies on Friday they say helped fund attacks against Americans by making protection payments to the Taliban.

“Defendants supported the Taliban for a simple reason: Defendants were all large Western companies with lucrative businesses in post-9/11 Afghanistan, and they all paid the Taliban to refrain from attacking their business interests,” the 288-page complaint filed in federal court in Washington, D.C. on Friday states. “Those protection payments aided and abetted terrorism by directly funding an al-Qaeda-backed Taliban insurgency that killed and injured thousands of Americans.”

Relying on confidential witnesses, internal documents and publicly available information from journalists, government watchdogs and congressional hearings, the complaint alleges companies that worked in war-torn Afghanistan commonly acceded to the Taliban’s mob-style demands for payment in exchange for the guarantee that their businesses interests would not be attacked.

One unnamed American executive who worked in Afghanistan is quoted in the complaint as saying “We don’t need any security if the payments are made. Nobody f—s with us.”

The payments allegedly climbed as high as 40% of the value of the company’s project and were often facilitated through subcontractors. The subcontractors, such as private security firms that were known to pay off the Taliban, would sometimes send money through Afghanistan’s traditional money transfer network, which can be hard to trace. Other times, the companies would simply hire Taliban operatives to work as guards.