From the Ashes is a campaign for C&C Red Alert that takes place after the Soviet victory. It depicts events which will eventually lead to the original Command & Conquer (also known as Tiberian Dawn). The campaign will have around 16 missions.
Tiberium Dusk is a re-imagining of the Kane s Wrath universe in a way I feel better fits canon, as EA did a pretty poor job with the C&C franchise continuity from Tiberium Wars onwards. This mod doesn t change anything with regards to the story but helps.