The U.S. pullout will leave the oil-rich eastern third of Syria up for grabs.
In its more than 30-year terror campaign against Turkey, the PKK - listed as a terrorist organization by Turkey, the USA and the European Union - has been responsible for the death of some 40,000 people, including women and children.
The Turkish military convoy with howitzers, artillery batteries and several units of the armed forces, was deployed to the border district of Elbeyli in Kilis province, state news agency Anadolu reported on Monday.
Hammoud said there is "no alternative" to Turkish forces and their allies replacing U.S troops.
Cavusoglu said Turkey has "the power to neutralize (IS) alone" amid fears that a United States pullout will hurt the fight against IS.
Trump announced last week that the USA will withdraw all of its 2,000 forces in Syria, a move that will leave control of the oil-rich eastern third of Syria up for grabs.
"We will deal with whoever can protect the. stability of this country", said Ahmed.
The withdrawal comes on the eve of a possible Turkish military operation in northeastern Syria against the YPG, a US -supported group that Ankara considers as the Syrian branch of the PKK, which is listed as a terrorist organization by Turkey, the USA and the EU.
Abandoned by the US, the Kurdish militia are confronting the dilemma of whether to try to hold on to the 30 percent of Syria they wrested from IS. Turkey already has troops in northwestern Syria and has backed Syrian fighters there to clear towns and villages of ISIS militants and US -backed Kurdish YPG fighters. Iraq's Prime Minister Adel Abdul-Mahdi said his government is "considering all the options".
Presidential spokesman Ibrahim Kalin told reporters after a Cabinet meeting on Monday that Trump wants to make the trip in 2019 but a date hasn't been set.
"The two leaders agreed to ensure coordination between their countries' military, diplomatic and other officials to avoid a power vacuum which could result following any abuse of the withdrawal and transition phase in Syria", the presidency said in a statement.
A Pentagon spokesman, Navy Cmdr.
At the start of the year, Turkey attacked the Kurdish enclave of Afrin in northwestern Syria.
In a new Twitter post, late Sunday Trump said his Turkish counterpart very strongly informed him that Turkey will eradicate whatever is left of Daesh in Syria.
Despite the threat against their territory, Gabriel said they will continue the war against ISIS as long as they can.
But Ankara says the US and the Kurdish YPG fighters didn't live up to their end of the deal and that it would start an offensive in eastern Syria to drive out the militia. In recent weeks Turkey said the USA was dragging its feet in implementing the deal and vowed to launch a new offensive against the Kurds.