Amazon argues that the decision should be revisited because of “substantial and pervasive errors."
One analyst said he expects Amazon, and perhaps others, to challenge the Pentagon contract decision in court.
Army aviation officials say that the budget stalemate could delay a step in the effort to develop a futuristic helicopter.
Amazon and Microsoft are battling it out over an opportunity to build the military its first "war cloud" computing system.
US senators across the political spectrum moved to block President Trump's plan to sell $8.1 billion in arms to Saudi Arabia.
Army budget officials initially requested $144.4 million for the Stryker "MOD" effort in the base budget.
Acting Defense Secretary Patrick Shanahan did not use his position to promote Boeing, the Pentagon's top watchdog said.
It's been 15 years since Boeing's north St. Louis County plant churned out an F-15 fighter plane for the Air Force.
Boeing Co. has won a $14.3 billion contract to service all B-1 Lancer and B-52 Stratofortress bombers at Tinker AFB.
Citizens for Responsibility and Ethics in Washington filed the request alleging Shanahan violated rules by promoting Boeing.