Answer: They took over trading cities, destroyed Muslim trade ships, and imposed taxes to get their way.
Step-by-step explanation:The plan for working on the Cape Route to India was charted by Portuguese King John II as a cost saving measure in the trade with Asia and also an attempt to monopolize the spice trade.In conclusion, the Portuguese transformed and influenced the maritime trade system in the Indian Ocean by force. They took over trading cities, destroyed Muslim trade ships, and imposed taxes to get their way.