奥巴马的两场战争指的是

伊拉克战争和阿富汗战争

原话如下,翻译也给你:
You did it because you understand the enormity of the task that lies ahead. For even as we
celebrate tonight, we know the challenges that tomorrow will bring are the greatest of our
lifetime -- two wars, a planet in peril, the worst financial crisis in a century.
你们这样做是因为你们明白摆在面前的任务有多艰巨。因为即便我们今晚欢呼庆祝，我们也知道明天将面 临我们一生之中最为艰巨的挑战－－两场战争、一个面临危险的星球，还有百年来最严重的金融危机。

伊拉克和阿富汗~Even as we stand here tonight, we know there are brave Americans waking up in the deserts of Iraq and the mountains of Afghanistan to risk their lives for us.我替楼上的补一下原话，

始于2001年的阿富汗和2003年3月的伊拉克战争