Ignoring the advice of his military and security advisers Although many in the Department of Defense (DoD), including Defense Secretary James Mattis, have tried for quite some time to convince the president not to make the move, he was unswayed by the advice of his military and security advisors. DoD officials say that the troop withdrawal will betray Kurdish allies fighting alongside US troops in Syria and Iraq. Moreover, they argued that by abandoning the Kurds the US would put any future alliances with local fighters at risk, as the US would be seen as an unreliable partner. In both Iraq and Syria, Kurdish groups have been among the most effective fighters against IS, bolstered by air support, intelligence, equipment and training from Western and Gulf powers. However, NATO member Turkey in particular objected to the cooperation with Kurdish groups it considers either terrorists or their accomplices.