Caesar's approach towards Britain in 54 BC was far more comprehensive and successful. New ships had been built over the winter, and Caesar now took five legions and 2,000 cavalry. He left the rest of his army in Gaul to keep order. Gilliver notes that Caesar took with him a good number of Gallic chiefs whom he considered untrustworthy so he could keep an eye on them, a further sign that he had not completely conquered Gaul. A series of revolts there late in the year provided further evidence of Gallic instability.