Since taking office previous year, three of USA top officials - President Trump, Vice President Pence and Secretary Tillerson - have visited all regions- except Africa.
Trump administration officials said Sunday there will be no more conditions imposed on North Korea before a first-ever meeting of the two nation's leaders beyond the North's promise not to resume nuclear testing and missile flights or publicly criticize U.S.
He was billed to spend Monday night in the Nigerian capital, Abuja, before flying back to Washington.
"Due to demands in the Secretary's schedule, he is returning to the USA one day early after concluding official meetings in Chad and Nigeria", Under Secretary of State Steve Goldstein told reporters. Tillerson says the visa restrictions were necessary because of "all the conflict that exists on Chad's borders".
Kenya's Foreign Affairs Cabinet Secretary Monica Juma bids farewell to U.S. Secretary of State Rex Tillerson as he boards his plane to depart Jomo Kenyatta International Airport in Nairobi, Kenya, March 12, 2018.
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Though Myanmar has a woman leading its civilian government, a profound gender gap remains in the country of 52 million people. MsCarmena has thrown her weight behind the event, tweeting: "On 8 March my agenda is a women's agenda".
The State Department said Chad is an "important partner" in the fight against terrorist groups and the country had made crucial steps to increase power over its security apparatus.
Chad was also confused because National Security Adviser H.R. McMaster said in September it might be able to come off the list "maybe in a couple of months".
Meanwhile, the U.S. Secretary of State has expressed the hope that school girls from both Chibok and would be released peacefully through some sort of negotiation.
Mr Tillerson was also accompanied on the visit by his Chief of Staff, Margaret Peterlin; Colonel John Walker, as well as the U.S. Ambassador to Nigeria, Mr Stuart Symington.
However, the specific deliverables of the trip, if any, remain unclear.
Tillerson said he had a good exchange with the Chadian authorities about the travel ban and that he wanted to assure the country that "the people of Chad are welcome in the United States".