Sentence:  Russian tanks and artillery parading through the streets of Havana , Russian intrigue in the Congo , and Russian arms drops in Laos ( using the same Ilyushin transports that were used to carry Communist agents to the Congo ) made it plain once more that the cold war <WSD>was</WSD> all of a piece in space and time . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)