Jan. 9 (UPI) -- Pope Leo XIV warned that "war is back in vogue" in his State of the World address Friday to ambassadors who are accredited to the Holy See.

The annual meeting is one of the most significant events in the Vatican's yearly calendar and helps to define its diplomatic positions for the year, according to Vatican News.

The pope took the moment to reference the United States' recent capture of Venezuelan President Nicolas Maduro and his wife, Cilia Flores.

"The principle established after the Second World War, which prohibited nations from using force to violate the borders of others, has been completely undermined," he said.

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