“The Pentagon is preparing to resume full ground operations alongside Kurdish partners in northern Syria, officials said Tuesday, a move that risks further inflaming relations with NATO ally Turkey, which blames the Kurds for a deadly bombing in Istanbul last month and has threatened a ground assault in retaliation. U.S. commanders restricted such movements after Turkey unleashed air and artillery strikes on the Syrian Democratic Forces (SDF), which in tandem with American military personnel have kept a check on the Islamic State’s lingering presence in the region. The two groups have carried out only limited joint movements in recent days, to conduct security patrols and transport supplies between bases, officials said. Three U.S. officials, speaking on the condition of anonymity to discuss a sensitive issue, said it is possible Turkey could follow through on its threat to send ground forces into northern Syria this month, potentially jeopardizing the Americans there and upending what has been a relatively stable situation for the past several years. “We are concerned with any action that may jeopardize the hard-fought gains made in security and stability in Syria,” Col. Joseph Buccino, a U.S. military spokesman, said in a statement. “Further, we’re concerned for the security of the SDF, our vetted, recognized and reliable partners in a place where we’ve withdrawn most troops.” The Turkish Embassy in Washington did not respond to requests for comment.”