With the help of the U.S., this country gained its independence from Colombia in 1903
[DOC] [TLE] Panama declares independence - Nov 03, 1903 - HISTORY.com [PAR] In 1903, the Hay-Herrn Treaty was signed with Colombia, granting the United ... 
To aid the rebels, the U.S.-administered railroad in Panama removed its trains ... 
Panamanians as an infringement on their country's new national sovereignty.