Fifteen militants laid down their weapons, saying that others will follow suit soon.
Counter-narcotics personnel are destroying poppy crops throughout Nangarhar Province.
Fierce ground and air assaults from Afghan forces and the popular uprising movement in the province forced the Taliban to surrender, local officials say.
Tribal elders and local officials quickly de-escalated the situation, saying fighting along the border benefits only terrorists.
Afghan forces have confined ISIS to just a small presence in Achin District, enabling 4,000 families to return home, officials say.
Civilian casualties from attacks by the Taliban, ISIS and other militants 'deliberately targeting' ordinary Afghans more than doubled in the first quarter of 2018 as compared to the same period last year.
Iran is enabling the Taliban's illegal drug trafficking to help fund the group and create insecurity in western Afghanistan, Afghan security officials and analysts say.
The replacement of Qari Hikmatullah with another Uzbek suggests the group is having difficulty replacing its leaders and is being forced to depend on foreign fighters with fluctuating loyalties.
The Taliban have abandoned previous red lines on the path to peace after realising they cannot defeat Afghan and coalition forces, observers say.
As Afghan forces press their advantage on the battlefield, Taliban and ISIS militants now are regularly wearing women's clothing in an attempt to escape the fighting.