US President Donald Trump launched the Pentagon’s new Space Command Tuesday, an effort to better organize and advance the military’s vast operations in space that could cost as much as $800 million over the next five years, AP reported.

Trump signed a one-page memorandum Tuesday authorizing the Defense Department to create the new command. Speaking at the Kennedy Space Center in Florida, Vice President Mike Pence said, “a new era of American national security in space begins today.”

The goal is to set up a command to oversee and organize space operations, accelerate technical advances and find more effective ways to defend U.S. assets in space, including the vast constellations of satellites that American forces rely on for navigation, communications and surveillance. The move comes amid growing concerns that China and Russia are working on ways to disrupt, disable or even destroy U.S. satellites.

The new order is separate from the president’s much touted goal of creating a “Space Force” as an independent armed service branch, but is considered a first step in that direction. The memo provides little detail on what will be a long and complicated process as the Defense Department begins to pull together various space units from across the military services into a more coordinated, independent organization.

According to one U.S. official, the command would pull about 600 staff from existing military space offices, and then add at least another 1,000 over the coming years. The roughly $800 million would mainly cover the additional staff. The costs for the existing staff would just transfer to the new command, but that total was not immediately available.

The official spoke on condition of anonymity to discuss internal deliberations not yet announced.