On Monday, men arrived in a boat at a beach in northeast Mexico and installed some signs signaling land that the U.S. Department of Defense considered restricted.
Mexico’s Foreign Affairs Ministry said late Monday that the country’s navy had removed the signs, which appeared to be on Mexican territory. “The origin of the signs and their placement on national territory were unclear,” the ministry said in a statement.
In fairness, we haven’t actually issued a Declaration of War since WW2. Everything since has been a policing action authorized under the bi-annual NDAA
What you call a “policing action”, the rest of us call crimes executed by war criminals.