The US government announced on Thursday to establish the US Space Command to defend its interests in space.

"This is a landmark day, one that recognizes the centrality of space to America's security and defense," President Donald Trump said in a White House ceremony joined by John Raymond, the first commander of US Space Command.

Trump ordered the establishment of Space Command late last year, making it the 11th unified combatant command of the US Department of Defense.

The newly established Space Command is built to "protect America's dominance in space" by "employing assigned forces from every branch of the military" and "delivering combat power by operating superior space capabilities such as communications, intelligence, navigation, and early missile detection and warning," according to a White House statement released on Thursday.

The establishment of United States Space Command represents a crucial step to improving the Nation's space warfighting structure in the ever evolving world, according to the statement.

A US Space Command existed from 1985 to 2002, but was disbanded in the aftermath of the 9/11 terrorist attacks as the country focused on defense of the homeland.

The new command is believed to be a step towards building an independent Space Force, a plan that still requires Congress approval.

The US Space Command will soon be followed by the establishment of the United States Space Force as the sixth branch of the United States Armed Forces, according to Trump.

"As a unified combatant command, the United States Space Command is the next crucial step toward the creation of an independent Space Force as an additional armed service," said US Secretary of Defense Mark Esper on Wednesday in a press conference.

The US Defense Department officials had discussed Space Force legislation with the congress, sources told SpaceNews. The Senate proposed a one-year transition before standing up a new military service but the House required no such transition, according to the sources.

The phased-in approach proposed by the Senate came out of concerns about excessive costs and growth in the military bureaucracy.

"There is no reason to believe that adding an entirely new Space Force bureaucracy and pouring buckets more money into it is going to reduce our overall vulnerability in space," said Senator Elizabeth Warren at a Senate hearing in April.

"In order to achieve the intent of standing up the new force and executing the bill, additional technical and conforming amendments are necessary," said a Defense Department memo.