Centcom's claim on the blockade of Iran's weapons transfer routes Centcom claimed that an order was given to establish a special force called "Iron Gate" consisting of about 20 military and civilian forces. This force should prevent Iran from using land borders and the Caspian Sea to transfer weapons in coordination with government organizations. Centcom also claimed that the naval blockade has prevented the export of more than $25 billion of Iranian oil since its resumption.