President Barack Obama needs help from secular, moderate militias to achieve his goal of degrading and destroying the Islamic State in Iraq and the Levant (ISIL). His strategy can work by enlisting Kurdish fighters as the point of the spear. Declaring an "ISIL no-go zone" on territories in Iraq and Syria under Kurdish control would shrink the space controlled by ISIL. Battlefield victories will also create momentum, encouraging others to join the fight against ISIL.

Obama asked the U.S. Congress for $500 million to train Syrian rebels. The request has merit, but Congress rightly asks: Who are they?