"strategic base" is correct and usable in written English.
You can use it to refer to a position, location, or set of resources that can be used to accomplish a specific goal or to gain an advantage. For example, "The company built a strong strategic base by establishing a presence in both domestic and international markets."
The fourth, Mayotte, stayed French and has prospered as a strategic base and fancy holiday destination.
At the minimum, this deep-sea port should provide Beijing with a strategic base soon.
The western region is an important strategic base of energy in China.
But accounts of the attack — the second in a week involving a device detonated near the strategic base — varied significantly.
And with it went Sevastopol, the strategic base for the Black Sea Fleet for more then 200 years and a city of deep emotional resonance for Russians.
An array of forces has labored to evict the Islamic State from the coastal town of Sirte, its strongest and most strategic base.
He concluded that through a network of more than 700 strategic bases around the world, the United States was committed to creating global hegemony.
But in 1939, faced with the disruption of vital oil supplies and the loss of strategic bases should Arab states side with the Axis, the British reversed their policy, bringing Jewish immigration virtually to a halt.
In deciding that the evidence was admissible, the court treated the initial failure to give the warnings as inadvertent rather than strategic, based on confusion about whether the suspect was formally in custody at the time.
The campaign itself has been unexpectedly strategic, based on a manifesto adroitly pitched both at energising Labour's base and the under-35s, who have responded with rare enthusiasm.
Five highly ambitious Chinese automakers are building stealthy, strategic bases in California.
