The leaked documents show more than 80,000 Iraqi deaths - civilians and Iraqi security forces - over a six-year period. Slightly more than half of those deaths, roughly 42,000, were recorded in Baghdad.

Civilians bore the brunt of the fighting: More than 66,000 were killed in six years, including 25,000 in 2006 alone. Iraqi security forces suffered just over 15,000 deaths, with violence against them peaking in 2007.

The documents record 4,031 US deaths during the six-year period from 2004-2009, which is slightly higher than the body count recorded by icasualties.org, an independent Web site that tracks such information. The annual American death toll remained fairly consistent for four years, before plummeting in 2008.

They also record 23,791 "enemy deaths." These peaked in 2007, at 6,757, dropping to 2,635 in 2008, and less than 400 in 2009.

There is great month-to-month variation in the numbers of Iraqi casualties and the number of people detained. Single events - mass-casualty bombings in Baghdad, for example, or the search for the Yusufiyah kidnappers - push up an individual month's total.

Still, there is an overall trend to the numbers of killed and wounded, which peaked in 2006 and 2007. Detentions stayed high until mid-2008.

Improvised explosive devices (IEDs), or roadside bombs, became one of the most popular weapons for Iraqi militants: More than 64,000 of them were detonated during the six-year period covered by these documents. Their use tracks the general security situation in Iraq, with roughly 18,000 explosions per year in 2006 and 2007.

The devices killed more than 2,000 US soldiers, and more than 20,000 Iraqis, the vast majority of them civilians.

Conflict in the capital has waxed and waned over six years: Baghdad accounted for fully 66 per cent of fatalities during the height of sectarian warfare in 2006, a figure that dropped to around 40 per cent by 2009. Fatalities increased in north-central Iraq, meanwhile, notably in Kirkuk, Ninewa, Salah al-Din and Diyala provinces.

These bar charts show the percentage of fatalities in each province.

The impact of IEDs was not geographically uniform: Two-thirds of all IEDs exploded in the area of operations (AOR) covered by just two of the coalition's seven commands: MND-Baghdad, which dealt with the capital; and MND-North, which controlled Diyala, Kirkuk, Ninewa and Salah al-Din.

Western Iraq remained somewhat less affected by IEDs, with "only" 3,440 of them detonating in the west in 2006, a number that has declined ever since.

Explosively formed penetrators (EFPs) became an increasingly popular weapon for militants in late 2006 and early 2007. Concave sheets of copper are laid on top of an explosive; when detonated, the bomb warps the metal, creating a super-heated "penetrator" that slices easily through even armored vehicles.

They were mostly used in Baghdad and south-central Iraq, according to the leaked documents; they were far less common in Sunni areas north and west of Baghdad.

Iraqi prisoners reported more than 1,000 cases of abuse at the hands of the Iraqi security forces (not all of their claims are credible, of course). Two-thirds of the allegations are centered on three provinces: Baghdad, Anbar and Ninewa.

Most of the remaining alleged abuse occurred in Ninewa, Diyala and Salah al-Din provinces, which saw some of the heaviest militant activity (and the worst violence) throughout the war.

"Escalations of force" occur when Iraqis fail to slow or stop at a checkpoint, or when they venture too close to a U.S. patrol. Soldiers are supposed to "escalate" their response, from verbal warnings to lethal force.

These incidents occurred more than 13,000 times during the six years covered by the Wikileaks documents, and resulted in more than 680 civilian deaths. They occurred less than a dozen times in 2004, a number that had spiked to more than 4,000 just one year later.

In 2005 and 2006, most escalation of force casualties (killed or wounded) occurred in northern and western Iraq, many of them inside the so-called "Sunni triangle."

The violence shifted into Baghdad in 2007, as sectarian bloodletting picked up and coalition forces began operating more checkpoints across the capital - creating more opportunities for deadly "mistakes." These shootings have been on a downward trend across the country in 2008 and 2009.

All of the reports are classified according to "region," one of the seven Multi-National Divisions, or MNDs, of the U.S. military in Iraq.

MND-Baghdad operated in the capital. MNF-West controlled Anbar, the Sunni province in western Iraq. MND-Central had jurisdiction over eight provinces in south-central Iraq, with a predominantly Shia population - except for Basra, which was controlled by the British in MND-Southeast. (These two later merged to form MND-South.)

In northern Iraq, MND-North covered Ninewa, Kirkuk (also known as Tameem), Salah al-Din and Diyala provinces, and MND-Northeast operated in Erbil, Sulaymaniyah and Dahuk.