The United States had a long tradition of keeping a small professional army and depending upon Citizen Armies when faced with war. This was first broached by the Confederates and later by the Union with drafts during the Civil War. The next instance was World War I, and then World War II through Vietnam. What we learned in Vietnam was that one cannot wage Empire with a Citizen Army. Israel seems to be learning the same thing. That a Citizen Army ultimately will not perform well when tasked with oppressing others rather than defending the nation. That decent citizens will find moral objection to being the instruments of ambition for others.
Turkish jets take part in U.S.-led coalition strikes against ISIS for first time (Reuters)
from the article: The draft-dodging state of Tel Aviv