During 1965 the PAVN had already begun construction of new supply routes to connect the segments of the Ho Chi Minh Trail that ran through southern Laos and into Cambodia. The following year, U.S. intelligence discovered that a new road (Route 110), coming up from Cambodia, was now linked to those in Laos. The discovery of Route 110 was the origin of the term "Sihanouk Trail", but it quickly came to encompass the entire Cambodian logistical system. The new PAVN overland logistical effort, and its seaborne corollary was now directed by PAVN "Unit K-20", located in the Cambodian capital of Phnom Penh. "K-20" worked under the guise of a commercial company owned by local ethnic Vietnamese.