“Two figures illustrate U.S. strategy on the different, albeit intertwined, wars playing out in Syria: one focused on Islamic State and the other on the regime of President Bashar al-Assad. As of Dec. 30, the United States and a few allied air forces have launched more than 420 airstrikes since Sept. 1 against bands of Islamic State fighters in Kobani, a small town on the Turkish border. Kobani once had a population of 40,000.”
Source: The War Against ISIS, by the Numbers – Washington Wire – WSJ