More than 100 years after the construction of the engineering marvel that linked the Atlantic and Pacific oceans — and 25 years after the canal was returned to Panama by the US — the Panama Canal faces renewed intimidation from US President Donald Trump.

The canal, which was once owned by the United States but was handed over to Panama decades ago, gives vessels a much shorter route between the Caribbean Sea and Pacific Ocean. While the two countries could end up resolving the issue,

President Donald Trump has called for the US to retake control of the Panama Canal unless the cost of passage for naval and merchant ships is slashed. Trump’s refusal to rule out the use of force is a throwback to the 19th century era of gunboat diplomacy.