TEHRAN, Young Journalists Club (YJC) - Addressing provincial leaders from his ruling Justice and Development Party on Friday, the Turkish leader vowed to "clean up" the city of Manbij, east of Afrin, also held by US-backed YPG militants.
“We will continue our fight until there is no terrorist on our border leading to Iraq,” Erdogan said.
Erdogan held phone talks with US President Donald Trump late on Wednesday. The US said Trump had urged Turkey to "limit its military actions" but a Turkish official said the US statement did "not accurately reflect the content" of the call.
On Friday, the Turkish leader criticized Washington's call for the operation to be "short" and "limited" in scope.
"How long has Afghanistan lasted? Nearly 20 years. How long has it lasted in Iraq? Nearly 18 years!" Erdogan said.
Turkey views Syrian Kurdish militants as allies of the Kurdistan Workers’ Party (PKK) militant group, which has been fighting a separatist war against Ankara for decades.
The offensive began days after the US said it will work with Kurdish militants to set up a 30,000-strong force inside Syria near the Turkish border.
Ankara first deployed troops to northern Syria in August 2016 after Kurdish militants refused to withdraw from the Syrian territory they had seized from Daesh.
Amid the increasingly complex theater of war in northern Syria, the Kurds on Thursday pleaded with Damascus to deploy troops to secure the borders of the Afrin area in the face of the Turkish invasion.
Damascus has decried both the American and Turkish presence on its soil as infringement on its territorial sovereignty.
On Friday, Vienna was hosting the second day of UN-sponsored talks on Syria, with warring factions discussing key issues like governance, drawing up a new constitution and holding elections.
The first day saw UN Special Envoy for Syria Staffan de Mistura holding separate talks with delegations from both sides which he said were “very very critical moment”.
The negotiations are meant to find a peaceful way out of the violence plaguing Syria since 2011.
A tandem process has also been underway since early 2017, with Turkey, Iran, and Russia as mediators. Turkey sides with anti-Damascus militants in the parallel talks, while the other two countries represent the Syrian government.
The talks began in the Kazakh capital of Astana, leading to establishment of four de-escalation zones across the Arab country. They are to continue later in the month in the Russian resort city of Sochi.
The UN has described the Astana negotiations as contributory to the mechanism monitored by the world body.