Rear Admiral Heidi Berg accused Chinese forces of "irresponsible actions" for allegedly harassing troops at an the base in Djibouti.
The U.S. and China have military bases within miles of each other in the east African country.
Over 10,000 Chinese marines traveled across the country for battle exercises as they prepared for threats at home and abroad.
The base was established in Djibouti in July alongside growing Chinese influence in Africa.
The base is in Djibouti, where the United States has its only permanent military base in Africa.
Until last week, Qatar had kept the peace on the border between the two African nations. Not any more.
No democratic leader congratulated Erdogan on his win except Trump.
Incumbent Ismaïl Omar Guelleh, in power for 17 years, is expected to stay in power.
The UN is preparing for a "massive influx" of refugees to Djibouti and Somalia as fighting in Yemen escalates.
Being named in Senate expose opens the possibility of seeking justice for Mohammed al-Asad
Attorneys hope case will expose wrongful detention at Djibouti black site and hasten the release of the Senate's CIA torture report.