Sentence:  Over the last fifty years of the century, however, the insurance industry, while remaining vibrant in London, also wandered upcoast to serve the needs of the Liverpool slavers who had begun to dominate the trade and whose city was rapidly becoming another <WSD>countercapital</WSD> of this cycle of accumulation. 
Meaning of the word marked with <WSD> tags:  A city other than the official capital that serves as a base of power and influence.