Washington (CNN) President Donald Trump announced Thursday the official establishment of the US military's Space Command.

"Those who wish to harm the United States, to seek to challenge us on the ultimate high ground of space, it's going to be a whole different ballgame," Trump said at a White House ceremony marking the command's establishment.

Space Command will become the 11th combatant command, joining the ranks of US Central Command, which oversees operations in the Middle East, and US Special Operations Command, which oversees Special Operations Forces.

The command will initially consist of just 287 personnel and its final location has yet to be determined. Its responsibilities will be transferred primarily from US Strategic Command.

The command's establishment comes as the US has grown increasingly concerned about threats to its satellites, which are critical to military operations and commercial business.

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