PHOTO: MCWHINNIE, SCOTT/CNN
Now playing
02:24
Taliban offer opportunities for peace talks
Alleged Taliban fighters and other militants stand handcuffed while being presented to the media at a police headquarters in Jalalabad on March 6, 2018. 
Afghan police said over 17 alleged Taliban militants including two Pakistani nationals were arrested during a five-week operation in Nangarhar province. / AFP PHOTO / NOORULLAH SHIRZADA        (Photo credit should read NOORULLAH SHIRZADA/AFP/Getty Images)
PHOTO: NOORULLAH SHIRZADA/AFP/AFP/Getty Images
Alleged Taliban fighters and other militants stand handcuffed while being presented to the media at a police headquarters in Jalalabad on March 6, 2018. Afghan police said over 17 alleged Taliban militants including two Pakistani nationals were arrested during a five-week operation in Nangarhar province. / AFP PHOTO / NOORULLAH SHIRZADA (Photo credit should read NOORULLAH SHIRZADA/AFP/Getty Images)
Now playing
01:21
The Taliban: How it began, and what it wants
PHOTO: CNN
Now playing
00:50
Pence: Proud of US troops in Afghanistan
Now playing
00:50
Trump on Afghanistan plan: 'Attack we will'
US President Donald Trump speaks during his address to the nation from Joint Base Myer-Henderson Hall in Arlington, Virginia, on August 21, 2017.
Trump said a rapid Afghan exit would leave
PHOTO: NICHOLAS KAMM/AFP/Getty Images
US President Donald Trump speaks during his address to the nation from Joint Base Myer-Henderson Hall in Arlington, Virginia, on August 21, 2017. Trump said a rapid Afghan exit would leave 'vacuum' for terrorists. / AFP PHOTO / Nicholas Kamm (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
Now playing
02:08
The pillars of Trump's Afghanistan strategy
CAMP BLESSING, AFGHANISTAN - OCTOBER 22:  Artilerymen await coordinates before firing a 155mm Howlitzer on a Taliban position October 22, 2008 from Camp Blessing in the Kunar Province of eastern Afghanistan. Their unit, Charlie Battery, 3rd Battalion of the 321 Field Artilery, has fired more than 5,900 shells since it deployed to Afghanistan less than a year ago, making it the busiest artilery unit in the U.S. Army, according to to military officers. They most often fire in support of Army infantry units battling Taliban insurgents in the nearby Korengal Valley, site of some of the heaviest fighting in Afghanistan.  (Photo by John Moore/Getty Images)
PHOTO: John Moore/Getty Images
CAMP BLESSING, AFGHANISTAN - OCTOBER 22: Artilerymen await coordinates before firing a 155mm Howlitzer on a Taliban position October 22, 2008 from Camp Blessing in the Kunar Province of eastern Afghanistan. Their unit, Charlie Battery, 3rd Battalion of the 321 Field Artilery, has fired more than 5,900 shells since it deployed to Afghanistan less than a year ago, making it the busiest artilery unit in the U.S. Army, according to to military officers. They most often fire in support of Army infantry units battling Taliban insurgents in the nearby Korengal Valley, site of some of the heaviest fighting in Afghanistan. (Photo by John Moore/Getty Images)
Now playing
00:54
Trump: US in Afghanistan to kill terrorists
US President Donald Trump speaks during his address to the nation from Joint Base Myer-Henderson Hall in Arlington, Virginia, on August 21, 2017.
Trump warned Monday that a hasty exit from Afghanistan would create a "vacuum" that would benefit America
PHOTO: NICHOLAS KAMM/AFP/Getty Images
US President Donald Trump speaks during his address to the nation from Joint Base Myer-Henderson Hall in Arlington, Virginia, on August 21, 2017. Trump warned Monday that a hasty exit from Afghanistan would create a "vacuum" that would benefit America's jihadist foes, in a major policy address on his strategy in the 16-year conflict. / AFP PHOTO / Nicholas Kamm (Photo credit should read NICHOLAS KAMM/AFP/Getty Images)
Now playing
00:42
Trump calls terrorists 'losers'
President Donald Trump speaks at Fort Myer in Arlington Va., Monday, Aug. 21, 2017, during a Presidential Address to the Nation about a strategy he believes will best position the U.S. to eventually declare victory in Afghanistan. (AP Photo/Carolyn Kaster)
PHOTO: Carolyn Kaster/AP
President Donald Trump speaks at Fort Myer in Arlington Va., Monday, Aug. 21, 2017, during a Presidential Address to the Nation about a strategy he believes will best position the U.S. to eventually declare victory in Afghanistan. (AP Photo/Carolyn Kaster)
Now playing
01:21
Trump: Our support is not a blank check
Now playing
00:45
Trump acknowledges flip-flop on Afghanistan
PHOTO: POOL
Now playing
01:04
Trump: Love for America requires love for all
president trump afghanistan war plan troop address_00003227.jpg
PHOTO: CNN
president trump afghanistan war plan troop address_00003227.jpg
Now playing
01:34
Trump: We produce a special class of heroes
US President Donald Trump walks by as reporters shout questions to him upon his arrival on the South Lawn at the White House on August 14, 2017 in Washington, DC. Later today President Trump will be meeting from Attorney General Jeff Sessions and FBI Director Christopher Wray regarding this weekendÕs events in Charlottesville, Virginia. (Mark Wilson/Getty Images)
PHOTO: Mark Wilson/Getty Images
US President Donald Trump walks by as reporters shout questions to him upon his arrival on the South Lawn at the White House on August 14, 2017 in Washington, DC. Later today President Trump will be meeting from Attorney General Jeff Sessions and FBI Director Christopher Wray regarding this weekendÕs events in Charlottesville, Virginia. (Mark Wilson/Getty Images)
Now playing
02:24
Will Trump send more troops to Afghanistan?
WASHINGTON, DC - JUNE 13:  U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request.  (Photo by Chip Somodevilla/Getty Images)
PHOTO: Chip Somodevilla/Getty Images
WASHINGTON, DC - JUNE 13: U.S. Defense Secretary James Mattis testifies before the Senate Armed Services Committee during a hearing in the Dirksen Senate Office Building on Capitol Hill June 13, 2017 in Washington, DC. Mattis and other Pentagon leaders testified about the proposed FY2018 National Defense Authorization Budget Request. (Photo by Chip Somodevilla/Getty Images)
Now playing
01:25
Mattis: New Afghanistan strategy decided
PHOTO: Getty Images
Now playing
01:27
US troops in Afghanistan: A history (2017)
An injured man is transported after a car bomb attack in western Kabul, Afghanistan, on Monday, July 24.
PHOTO: WAKIL KOHSAR/AFP/Getty Images
An injured man is transported after a car bomb attack in western Kabul, Afghanistan, on Monday, July 24.
Now playing
00:46
Dozens killed in Kabul car bombing
PHOTO: CNN
Now playing
02:52
Marines remaining in Afghanistan face hardship
(CNN) —  

The Taliban have strengthened their grip in Afghanistan over the past three years, according to a new report released by the US government’s own ombudsman of the war.

In its quarterly report for the US Congress, the Special Inspector General for Afghan Reconstruction (SIGAR) said that the Afghan government currently controls or influences only 55.5% of the country’s districts, marking the lowest level recorded since SIGAR began tracking district control in November 2015.

Translated into layman’s terms, the report measures “control” – in which one side runs an area – and “influence” – in which one side has the upper hand.

In November 2015, the Afghan government controlled 72% of districts in the country, but now controls just 56% of them. Insurgent influence or control has risen to 12.5% of districts from just 7% and approximately a third of Afghanistan is a “contested” area.

The official figures offer a glimpse into the Afghan army’s loosening grip in the face of a determined, sustained Taliban insurgency and a bleak outlook for America’s involvement in the war – now in its 17th year. 

The war in Afghanistan is the only US foreign policy issue on which US President Donald Trump has delivered a lengthy personal delineation of policy and goals. In August 2017 he said: “One way or another, these problems will be solved — I’m a problem solver — and, in the end, we will win.”

Yet the challenges have been clear for the new US commander in Afghanistan, special forces veteran Gen. Scott Miller. Earlier this month, the top police and intelligence chief of the southern region of Kandahar was shot dead meters away from him during a maximum-security meeting; the gunman also injured one of Miller’s top officers.  

Civilian deaths at a record high

As the Taliban continues to slightly increase its territorial impact, civilian deaths keep rising.

An escalation in insurgent attacks and fighting between the Taliban and government forces has helped drive the number of civilian deaths this year to its highest point on record. A total of 1,692 civilians were killed by June 30, according to the United Nations Assistance Mission in Afghanistan (UNAMA). 

From January 1 to September 30, 313 civilians were killed and 335 injuries in US-backed air strikes alone – a 39% increase from 2017, according to the report, citing UNAMA data.

Resolute Support, the larger non-combat NATO-led training and advisory mission, said far fewer civilians had died from air strikes, reporting 102 civilian deaths from January to August 15, 2018. 

Losing strength 

The Afghan National Security Forces (ANDSF), who are tasked with defending the war-ravaged country from a continuing insurgency, have struggled to maintain personnel – indicating that a multi-billion dollar training program funded by the US is failing.

The ANDSF is short of roughly 40,000 personnel – or 11% – of its target strength of 352,000 personnel.

No explanation was provided for the drop in those numbers, although the growth of the insurgency over the past few years will probably have led to the deaths of many police or army personnel, or contributed to the decision of others to leave the forces.

The United States Department of Justice has also raised concerns about the Afghan attorney general’s performance, citing corruption and “unproductive, corrupt and patronage-laden” practices.

Earlier this month, Afghans rode a wave of hope that the notoriously corrupt and inefficient political system in Afghanistan could be overhauled as they cast their ballots in a vote that had already been delayed for three years because of security concerns.

But the days leading up to the vote were marred with violence.

The Taliban claimed responsibility for the October 18 attack on the powerful police chief of Kandahar province, Gen. Abdul Raziq Achakzai. Hours after his death, they issued another statement warning Afghans not to participate in what they called “an American project from start to finish.”

The Taliban message said the group intended to close all “major and minor roads” throughout the country and urged Afghans to stay indoors. “We do not want to harm any common Afghan and therefore ask the public and especially city dwellers to refrain from participating or casting votes during elections,” it said.

A candidate for parliament in Helmand province, Abdul Jabar Qahraman, was killed with three others by a bomb in his campaign office days before the election.

After casting his vote, Afghan President Ashraf Ghani thanked law enforcement, election officials and citizens who made the election possible “despite the risks involved.”

CNN’s Nick Paton Walsh and Ali M. Latifi contributed to this report.

Correction: An earlier version of this story and its headline mistakenly included a quote from the 2016 Special Inspector General for Afghan Reconstruction's report.