Relations between Mexico and France had been strained for some
time, since Mexico had failed to repay millions of dollars worth of
French loans. When a pastry cook called Remontel claimed that
looting Mexican soldiers had damaged his shop, and the Mexicans
refused to pay the damages demanded by Louis-Philippe, the French
used this as a pretext to occupy the port of Vera Cruz. In
response, Mexico now declares war on France.
Citation:
Editors. "Mexico declares war on France".
The Literary Encyclopedia. First published 30 December 2011
[http://www.litencyc.com/php/stopics.php?rec=true&UID=18029, accessed 19 May 2013.]