By Alex Shone, UK Defence Forum Research Associate in Residence

The total number of drone attacks for 2011 has now reached 19 according to the Long War Journal resulting in a total of 83 insurgent and terrorist casualties. The journal now reports at least 21 civilian casualties as a result of attacks.

March has been a month of steady drone activity. Notable events were the controversial attack on the 17th March which is thought to have killed a large number of suspected militants, though perhaps also to have killed civilians.

It is also worthy of note the reaction by militant groups in the region to the drone strikes, particularly the strike of the 17th. Action taken by the militants against those they deem as 'spies', the human intelligence assets helping to target drone strikes, appears to have intensified.

28th March:

The Taliban have created a group assigned to hunt down tribesmen suspected of providing information to the CIA that enables the Predator campaign to target terrorist leaders in Pakistani tribal areas.

The group, known as the Lashkar-e-Khorasan, or Army of the Khorasan, was established in North Waziristan last year by both the Haqqani Network and Taliban forces under the command of Hafiz Gul Bahadar. The creation of the group was confirmed by Pakistani intelligence officials, tribesmen, and members of the Taliban.

22nd March:

A "dual hatted Taliban and al Qaeda commander" who leads forces on both sides of the Afghan-Pakistan border has threatened to avenge a recent controversial Predator strike in the Taliban-controlled tribal agency of North Waziristan.

Qari Zia Rahman, who commands both al Qaeda and Taliban forces in Afghanistan and Pakistan, threatened to retaliate against US forces in Afghanistan for the March 17 Predator strike in the Datta Khel area of North Waziristan. The strike, which was denounced by top Pakistani military and political leaders, killed more than 30 people, including 10 Taliban fighters and a senior lieutenant loyal to North Waziristan Taliban leader Hafiz Gul Bahadar.

21st March:

The Taliban executed four more so-called 'US spies' who were accused of providing information that led to last week's controversial Predator airstrike in the Datta Khel area of North Waziristan.

The Taliban also accused the men of aiding the US in the March 17 Predator strike that killed more than 30 people, including 10 Taliban fighters and a senior lieutenant loyal to North Waziristan Taliban leader Hafiz Gul Bahadar.

17th March:

US Predators carried out another attack in the al Qaeda haven of Datta Khel in Pakistan's Taliban-controlled tribal agency of North Waziristan, the second in the area in two days.

Reports as to the precise number of casualties differ as do those surrounding the target of the strike. It is believed that a large number of militant fighters were among the dead, as were civilians and even perhaps members of the security forces.

This strike was strongly and openly condemned by Pakistan's top military commander, General Ashfaq Parvez Kayani.