The Defense Department recently issued a report to Congress that assesses "China's global expansion by military and nonmilitary means, implications of China's activities, and the U.S. response."
The report "describes China's expansion by a range of means, including military access and engagement; the One Belt, One Road (OBOR) and Digital Silk Road initiatives; technology acquisition; and a growing economic footprint; with a focus on areas of military expertise."
The DOD report notes that the Chinese People's Liberation Army is establishing its first overseas military base in Djibouti in East Africa "and probable follow-on bases will increase China's ability to deter use of conventional military force, sustain operations abroad, and hold strategic economic corridors at risk," adding that the PLA's "expanding global capabilities provide military options to observe or complicate adversary activities in the event of a conflict."
Check out the full report here.