In the past, soldiers fought only by land, sea or air. On Thursday, however, Israel fought Hamas on the cyber frontier as well. Around the same time that IDF ground troops entered Gaza Thursday night, Israeli hackers took down a number of prominent Hamas and Islamic Jihad sites. The sites either crashed or showed error messages. The sites included Hamas' official website, Qudstv.ps, along with Felesteen.ps and Gaza Alan.This is not the first time Hamas has been the victim of hacking. Earlier in the week, leading Hamas websites such as Shehab.ps, displayed anti-Hamas headlines that, when clicked, played a video from Egyptian Television that was unfavorable to Hamas. In the video, from the Egyptian anti-Hamas website El-Balad, Hamas leader Khaled Mashaal is seen living a life of luxury. The anchor on the video says: "If Mashaal is man enough, why doesn't he take a plane from Qatar to Egypt . We would gladly open our border and let him enter the Gaza Strip, and then he can hide together with Hamas leader [Ismail] Haniyeh in a bunker underground."