The Pentagon scrubbed its latest National Defense Strategy of all references to climate change, an Orwellian rhetorical shift away from a scientific reality at an agency that has long avoided the issues politics.

A summary document released Friday morning makes no mention of climate, warming, planet, sea levels or even temperature. All 22 uses of the word environment refer to the strategic or security landscape. The 11-page memo , signed by Defense Secretary James Mattis, is the first update to the policy in a decade.

Its unlikely the Department of Defense will release a full National Defense Strategy report; instead, the document is expected to remain classified. The Pentagon did not immediately return a call requesting comment.

The move comes a month after the White House dropped climate change from the list of threats in its National Security Strategy. But it was not unexpected. Days after the president released his security memo, the Pentagons No. 2 civilian official said the National Defense Strategy would not specifically address climate change.

It really reflects the high priorities of the department, Deputy Defense Secretary Patrick Shanahan told reporters at the time.

The George W. Bush administration first added climate change to its 32-page National Defense Strategy report in 2008, clearly stating: [C]hanges with existing and future resource, environmental, and climate pressures may generate new security challenges ... These risks will require managing the divergent needs of massively increasing energy demand to maintain economic development and the need to tackle climate change.

The new strategy contradicts Mattis, chairman of the Joint Chiefs of Staff Gen. Joseph Dunford and four other former top military commanders who were quoted in the defense bill President Donald Trump signed last month saying things such as, Climate change is a national security issue. The National Defense Authorization Act devoted roughly 870 words to the vulnerabilities to military installations linked to global warming and sea level rise over the next two decades, and warned that climate-linked droughts and famines could lead to more failed states and propagate terrorist organizations.