I wrote this a while back:
War College connection gives U.S. influence in Egypt's struggle
When the Egyptian military removed the country’s divisive but democratically-elected president, Mohammed Morsi, the action was led by a general who had studied for almost a year at the U.S. Army War College in Carlisle.
The close personal relationships General Abdel Fattah al-Sisi developed through his time at the War College could help the U.S. influence the course of events there, according to retired Col. Stephen Gerras, who teaches at the college.
Since World War II, the US military has used its schools to strengthen our alliances and to integrate allies into our military structure. Students from allied countries can be found at all levels-- from the service academies to the war colleges. Similarly, each branch opens the doors of its war college to members of the other branches.
The benefits are obvious. It is much easier to cooperate with Peru on counter-insurgency if the Peruvian generals have been exposed to American doctrine and methods. The cooperation can be even more effective if some of the officers know each other from their time in the classrooms at Leavenworth or Newport.
In many cases, study at the American military schools helps foreign officers in their quest for promotion. Over the long-term this strengthens the ties with allied forces: the top ranks of their services are populated with graduates of our schools.