After the Ottomans surrendered in 1918, the leaders of the Young Turks fled to Germany, which promised not to prosecute them for the genocide. (However, a group of Armenian nationalists devised a plan, known as Operation Nemesis, to track down and assassinate the leaders of the genocide.) Ever since then, the Turkish government has denied that a genocide took place. The Armenians were an enemy force, they argue, and their slaughter was a necessary war measure. Today, Turkey is an important ally of the . and other Western nations, and so their governments have likewise been reluctant to condemn the long-ago killings. In March 2010, a . Congressional panel at last voted to recognize the genocide.