
The Civil War Era
66
The TrenT inCidenT
During the fall of 1861, as President 
Lincoln tried to prod General 
McClellan into action, he also dealt 
with another diffi cult situation. On 
November 8 a U.S. Navy vessel, 
the U.S.S. San Jacinto, intercepted a 
British mail ship, the Trent, en route 
from Havana, Cuba, to the Virgin 
Islands. Two Confederate diplomats—
John Slidell from Louisiana and James 
Mason of Virginia—bound for Paris 
and London were taken prisoner by 
the commander of the U.S. ship, 
Captain Charles Wilkes. Slidell had 
served in Congress during the 1840s 
and had negotiated with the Mexican 
government during the Mexican–
American War. His brothers-in-law 
included the Southern General P.G.T. 
Beauregard and American Naval 
Commodore Matthew Perry.
The two Southerners were on a 
diplomatic mission at the time of 
their capture. The South was seeking 
support for its war efforts from the 
British and French governments. 
If either European power had 
entered the war, either militarily 
or with economic aid, the South 
would have gained signifi cantly 
from their involvement. Realizing 
the importance of his two captives, 
Captain Wilkes took them to Boston 
and placed them in a Union prison. 
The Northern press learned of the 
Trent Incident, and touted Wilkes as a 
hero. Congress even struck a special 
medal to honor him. 
However, the British government 
was outraged. A U.S. Navy vessel had 
forcefully detained a British ship. For 
a time there was some talk in London 
of Britain going to war with the 
Union over the incident. The Lincoln 
administration soon intervened.  
Secretary of State William Seward 
declared that the American war 
vessel had taken illegal steps by 
imprisoning the two Confederate 
diplomats and not bringing the case 
before an admiralty court. Although 
the British Prime Minister, Viscount 
Palmerston, delivered an ultimatum to 
the president, demanding an apology, 
Lincoln merely released Mason and 
Slidell by the end of December. The 
president never formally apologized 
for the Navy’s actions. Mason and 
Slidell resumed their voyage to 
England but failed in their mission.
BOOK_5_CIVIL.indd   66 11/8/09   10:48:47