ISLAMABAD - The unusual decision to deploy the army in Islamabad is just the latest step in a two-month-old military campaign against the Taliban.

Senior members of the government say the move is designed to block reprisals for army attacks against the Taliban in the North Waziristan area along the Afghan border.

According to Mr. Sharif’s opponents, however, the decision to deploy army in Islamabad is really a ploy to block an anti-government protest planned for August 14, led by Imran Khan. Mr. Khan has campaigned for investigations into the 2013 elections and claims that they were rigged by PML-N.  

Many have interpreted the move as a sign that Mr. Sharif is nervous about his hold on power only a year after he has been appointed Prime Minister for the third time.