The Israeli military issued the world's
 first announcement of a military campaign via Twitter today with the 
disclosure of a large-scale, ongoing operation in Gaza. The Twitter 
announcement was made before a press conference was held.
 
  
A major Israeli military campaign in the Gaza Strip was 
announced today via Twitter in lieu of a formal press conference. The 
Israeli Defense Forces' official @IDFSpokesperson
 Twitter feed confirmed “a widespread campaign on terror sites & 
operatives in the #Gaza Strip,” called Operation Pillar of Defense, at 
approximately 9:30 a.m. Eastern time. Shortly before the tweet, Hamas' 
military head Ahmed al-Jabari was killed by an Israeli missile 
strike--Israel's military claims al-Jabari was responsible for numerous 
terror attacks against civilians. The IDF announcement on Twitter was 
the first confirmation made to the media of an official military 
campaign.
 
The Israeli military incursion follows months of rising tension in 
Gaza and southern Israel. More than 100 rockets have been fired at 
Israeli civilian targets since the beginning of November 2012, and 
Israeli troops have targeted Hamas and Islamic Jihad forces inside Gaza 
in attacks that reportedly included civilian casualties. According to 
the IDF spokespersons' office, the Israeli military is “ready to 
initiate a ground operation in Gaza” if necessary. Hamas' military wing,
 the Al-Qassam Brigades, operates the @alqassambrigade Twitter feed, which confirmed al-Jabari's death.