The Obama administration says it killed one civilian and 431-441 combatants in counterterrorism strikes last year – contrasting slightly with the Bureau’s estimate of four to six civilians and 358-501 combatants.

Obama embraced the US drone programme, overseeing more strikes in his first year than Bush carried out during his entire presidency. The use of drones aligned with Obama’s ambition to keep up the war against al Qaeda while extricating the US military from intractable ground wars, but the targeted killing programme has drawn much criticism.

Dataset: the US air war in Afghanistan continues under its third commander in chief.

Dataset: US strikes continue in Yemen despite catastrophic civil war and Saudi-led bombing campaign pushing country towards starvation.

Dataset: Civilian casualties fell sharply as drones launched the fewest strikes of the Obama presidency.

Dataset: Nato may have stopped combat operations but the war in Afghanistan continues apace

Dataset: Nato’s combat operations may have stopped, but US counter-terrorism operations continue in Afghanistan

Dataset: US promised to continue its counter terrorism campaign in Yemen despite turmoil that engulfed the country.

Dataset: 2015 began as 2014 ended for the CIA – apparently hunting Taliban fighters along the Afghan border with North Waziristan

Dataset: 2014 started with the longest pause in drone strikes of the 10-year campaign.

Dataset: The Bureau’s database on reported CIA and JSOC air strikes and other covert actions in Yemen.

Dataset: US resumes targeting of alleged militants within days of the year’s start.

Dataset: Increased debate around the use of drones affects the campaign in Pakistan.

Dataset: US covert operations in Yemen peaked in May 2012 with an intense assault on al Qaeda.

Dataset: A searchable record of US covert operations in Yemen from the start of the war on terror.

Dataset: Bureau’s analysis of secretive western military intervention in Somalia since September 2001.

Dataset: Civilian casualties fell sharply as drones launched the fewest strikes of the Obama presidency.

Dataset: Various crises in US-Pakistani relations may have contributed to a decline in strikes in 2011.

Dataset: The largest number of CIA drone strikes hit Pakistan in the campaign so far.

Dataset: In 2009 Obama carried out as many drone strikes on Pakistan as Bush in five years.

Dataset: During President Bush’s time in office there were 52 drone strikes on Pakistan.