The Pentagon will send hundreds of additional spies overseas as part of an ambitious plan to assemble an espionage network that rivals the CIA in size, U.S. officials said. The project is aimed at transforming the Defense Intelligence Agency ... into a spy service focused on emerging threats and more closely aligned with the CIA and elite military commando units. When the expansion is complete, the DIA is expected to have as many as 1,600 collectors" in positions around the world, an unprecedented total. They will be trained by the CIA and often work with the U.S. Joint Special Operations Command, but they will get their spying assignments from the Department of Defense. Among the Pentagon's top intelligence priorities, officials said, are Islamist militant groups in Africa, weapons transfers by North Korea and Iran, and military modernization underway in China. The Pentagon's plan to create what it calls the Defense Clandestine Service, or DCS, reflects the military's latest and largest foray into secret intelligence work. The DIA overhaul - combined with the growth of the CIA since the Sept. 11, 2001, terrorist attacks - will create a spy network of unprecedented size. The expansion of the agency's clandestine role is likely to heighten concerns that it will be accompanied by an escalation in lethal strikes and other operations outside public view. Because of differences in legal authorities, the military isn't subject to the same congressional notification requirements as the CIA.