In a string of tweets, his movement, which might open the way for Turkey to establish an assault on Kurdish fighters was defended by Mr. Trump.
The Democratic allies of Mr. Trump heavily criticised the withdrawal.
Kurdish forces were crucial US allies in beating the Islamic State (IS) in Syria.
Only about two dozen was hauled out according to a senior state department official, although the US has some 1,000 troops around Syria.
Mr. Trump originally tweeted Monday he was chosen on”getting from those ridiculous endless wars” “Turkey, Europe, Syria, Iran, Iraq, Russia, and the Kurds would finally have to figure out the situation”.
After accusations from US Kurdish allies that they were”stabbed in the back” and criticism from across the US political spectrum, Mr. Trump delivered out more tweets after on Monday, cautioning Turkey to not make the most of his decision, saying he would”ruin and interrogate” its market.
This past year, that the US increased tariffs on several Turkish goods and enforced sanctions on leading officials as connections between both Nato countries worsened over a variety of problems.
Afterward, when enlarging his”off-limits” tweet, Mr. Trump said Turkey must”not do anything out of what we’d believe is humanist”.
In addition, he said there could be a “big problem” if”some of our folks get hurt”.
In a statement, Pentagon spokesman Jonathan Hoffman stated: “that the Department of Defense made apparent to Turkey – as did the president that we don’t endorse a Turkish functioning in Northern Syria”.
In the current UN General Assembly, Mr. Erdogan made a map showing a 480km (300 kilometers ) long and 30km profound”secure zone” that he needs Turkey to restrain over its border with Syria.
This could resettle around 2 million of the over 3.6 million Syrian refugees now residing in Turkey.
On Monday, Turkey’s defense ministry stated that “all training for its surgery have been finished,” including the establishment of such a zone has been”essential” to get Syrians and also for peace in the area.
However, Turkey has repeatedly threatened to strike fighters throughout the border in Syria.