President Obama plans to send more military advisers to Iraq to stabilize it . It is unclear what victory even looks like anymore . Julian Zelizer : History shows us that mission creep is difficult to overcome . He says many operations - in Korea , Vietnam , Iraq - start small but end big . Zelizer : Obama could find himself forced to deploy more troops than he should .
President Obama plans to send more military advisers to Iraq to stabilize it . Julian Zelizer : History shows us that mission creep is difficult to overcome . He says many operations - in Korea , Vietnam , Iraq - start small but end big . Zelizer : Obama could find himself forced to deploy more troops than he should .