"They can not wait us out", he said, "We are beginning to see the results both on the battlefield where the Taliban's momentum is slowing and in the prospects for peace with them".
"The strategy has sent a clear message to the Taliban - they can not wait us out - and we are beginning to see the results both on the battlefield where the Taliban's momentum is slowing and in the prospects for peace with them", Pompeo said.
The statement claimed the Taliban has extended its control to "over 70% geography of Afghanistan" and it will continue its fight until an independent "Islamic system" is implemented in the country.
The incident marks the first combat fatality for the US military in Afghanistan since April 30 and the second there this year.
The Saudi government and the Organization of Islamic Cooperation (OIC) have jointly organized the two-day event entitled International Conference of Muslim Scholars on Peace and Stability in Afghanistan. Two other Americans were wounded in the attack.
The Taliban went back to attacking government positions after three days, while the Afghan government formally concluded its own cease-fire on June 30.
Radio Free Europe reported that Pompeo's visit to Afghanistan "coincides with what could be a final operation to clear fighters from the IS group and other insurgents in a remote district in the eastern Nangarhar Province".
Wells, who heads the bureau for South and Central Asian affairs at the US State Department, said at a news briefing in Washington this week, "It's critical that Pakistan and Afghanistan have improved relations in order to reinforce what has to be a unified effort to achieve reconciliation in the region".
Incidents like these have decreased in frequency in recent years as USA and North Atlantic Treaty Organisation forces have increased vetting of Afghan troops and taken precautionary measures, such as assigning protection forces known as "guardian angels" to advisory units. This will be settled by the Afghan people coming together, their cumulative realisation that living together in harmony and peace, treating each other with dignity, which was seen during the ceasefire and we have seen it in the aftermath.