The Department for Energy Security and Net Zero ended the ban on new onshore wind farms when Labour came to power in 2024.
That meant that wind farms were prioritised as a Nationally Significant Infrastructure Project.
The government said its strategy for easing planning rules was crucial to achieving clean power targets by 2030.
The MOD has also objected to proposals for a wind farm in the East Yorkshire Wolds, claiming it would impact air defences and jet pilot training exercises.
Local people have voiced their concerns over the proposal, with campaigners calling it the “devastating industrialisation” of Yorkshire Dales moorland.
Councillor Angus Thompson, who has helped to lead the campaign against the wind farm, said that the MOD’s “stark warning is the nail in the coffin for this scheme”.
“The MOD considers that these monster turbines threaten national security and the lives of pilots,” he said.
“This hopeless project should be abandoned without delay.”
The developer argues the scheme could generate enough renewable electricity to power about 135,000 homes while helping meet climate targets.
Euan Hutchison, UK development director at Fred. Olsen Renewables, said Hope Moor could help in reducing reliance on imported energy and deliver a more secure and affordable energy system.
“We also believe national security and energy security go hand in hand,” he said.
He encouraged residents, businesses and community groups to submit feedback as plans for the development continue to be refined.
A decision on whether the development will go ahead will eventually be decided by the Secretary of State for Energy.