U.S. President Donald Trump on Thursday hailed a court decision that green lights his administration to build a section of his controversial southern border wall.

“Breaking News: The Fifth Circuit Court of Appeals just reversed a lower court decision & gave us the go ahead to build one of the largest sections of the desperately needed Southern Border Wall, Four Billion Dollars,” Trump said on Twitter.

“Entire Wall is under construction or getting ready to start!” he said.

Trump’s remarks came hours after a federal appeals court in Louisiana ruled Wednesday the government could use $3.6 billion in military

Read more: Trump hails court decision on US-Mexico border wall