NATO says Taliban's announcement of their spring military offensive in Afghanistan is a sign of the insurgents' desperation over recent setbacks.
A NATO official in Brussels also said Taliban will try to gain a propaganda victory through coordinated attacks and that the U.S.-led coalition already has tightened security.
Earlier Saturday, Taliban said that beginning Sunday they would launch attacks on military bases, convoys and Afghan officials.
The NATO official said on condition of anonymity in keeping with regulations that the insurgents will use their spring offensive to try to undermine the transition process, but that it actually is "a sign of their impotence and desperation."
NATO claims Taliban have recently suffered setbacks such as high casualties and the loss of traditional strongholds.