US aircraft dropped pamphlets written in Afghanistan's Pashtu and Dari languages on the arid plains near Gardez on Sunday, warning that the days of al-Qaida and the Taliban were numbered and urging residents not to support them.
"Stop resisting. End your fight. Otherwise, you are finished," the leaflets declared.
They urged residents to inform coalition forces against regrouping al-Qaida and Taliban troops and featured a picture of a Taliban fighter armed with a Kalashnikov sitting on a truck.
US aircraft dropped thousands of the leaflets overnight.
US bombers blasted the cavernous mountains of eastern Afghanistan for a third day on Sunday, pressing a new offensive against al-Qaida and Taliban fighters believed to be regrouping there.
Sunday's assault involved mostly airstrikes, not ground attacks, with frequent bombing runs over the Shah-e-Kot mountain range 30 kilometres (20 miles) east of Surmad and the Kharwar range to the west in Logar province.
The bombardments sent thick black plumes of smoke above the snow-capped peaks and shook the ground in Surmad, where a constant stream of B-52 bombers streaked overhead.