GDI has attacked and cut off one of our bases. Find a way into the base. One of our agents will assist you by placing a landing flare at the right time. Once you're in, rebuild the base and destroy the GDI forces in the area. - Mission briefing
GDI forces were besieging a Nod base during their campaign across Europe. In an effort to relieve the forces at their base Nod sent a pair of commandos and an engineer to fight their way to friendly forces. Once there they planned to repair and rebuild before training an army capable of taking on the local GDI presence.