The phrase "a promise to deploy" is correct and usable in written English.
It can be used when discussing commitments or assurances related to the implementation or launch of a project, service, or product.
Example: "The company made a promise to deploy the new software update by the end of the month."
Alternatives: "a commitment to implement" or "an assurance to launch".
President Obama, in his speech on Thursday before a joint session of Congress, promised to deploy the power of the federal government to induce small businesses to hire out-of-work Americans.
During the Republican primaries, Trump promised to deploy a "deportation force" to round up the immigrants and expel them, drawing sharp rebukes from GOP rivals, including Ohio Gov. John Kasich and former Florida Gov. Jeb Bush.
Its home minister, Palaniappan Chidambaram, has promised to deploy an additional 15,000 centrally trained police to the six most affected states by April taking their number to around 75,000 in all.
The group said it would testing next-generation equipment that could go into a deep sleep mode but made no promises to deploy it.
On a visit to the region this month, Ashton Carter, America's defence secretary, promised to deploy more state-of-the-art weaponry to counter North Korea.China's growing willingness to talk to Japan may also have spurred South Korea to overcome its scruples about doing so.
This contradicted an earlier statement by the Polish president, Lech Kaczynski, that Obama had promised to deploy the system.
Despite official assurances that the arrests were not related to the security of the Games, preparations for the event have been tarnished by the failure of G4S, a huge global security company, to recruit all of the 10,400 personnel it promised to deploy.
West African countries that have promised to deploy troops first have not said when they will come.
Some prominent individual investors promised to do just that; others promised to deploy for the cause money that they managed for third parties.
