Several people in Germany were left injured after police used pepper spray against some demonstrators opposed to Turkey's ongoing military operation Olive Branch against the Kurdish People's Protection Units (YPG) in Syria's Afrin region.
But Ankara has always threatened to expand the operation to the east to oust the YPG from the swathe of territory it controls right up to Iraq.
Erdoğan said North Atlantic Treaty Organisation member Turkey sent troops to conflict zones when requested - giving the examples of Somalia, Afghanistan and the Balkan region - but did not receive necessary support for its Afrin mission in return.
"Once we have purged the terrorists (from Afrin) we will then cleanse them from Manbij, Ayn al-Arab, Tel-Abyad, Ras al-Ayn and Qamishli", he said in televised comments.
Qamishli is seen as the main town of the YPG-controlled region.
Bannon to French far-right party: 'Let them call you racists'
Bannon's visit to France was his latest stop on a tour of European countries, which has included Switzerland and Italy. The showing of the League, a National Front ally, "is a new step in the awakening of the people", Le Pen tweeted.
Other PKK-propaganda posts were also found on the webpage, which says, "As long as the attack on Afrin continues, the resistance will grow daily", referring to the current Turkish-led counter-terrorism campaign in northwestern Syria.
United States support for the YPG in the fight against terrorist group ISIS in Syria has strained ties between Ankara and Washington. "But NATO when will you stand behind us?" he said on March 11, saying Turkey's borders are "under constant threat".
In mid-February, Turkey marked 66 years of North Atlantic Treaty Organisation membership, and according to the North Atlantic Treaty Organisation charter an attack on one of the alliance's members is an attack on them all.
The Turkish Armed Forces and Free Syrian Army (FSA) liberated five more villages in Syria's northwestern Afrin region on Sunday.