Black and Hispanic adults represent sizable and growing shares of the armed forces as of 2017, and more women are serving in the military than ever before. Above, service members are honored in a pregame ceremony for Armed Forces Night in Kansas City, Missouri. (Reed Hoffmann/Getty Images)

Today’s active duty military is smaller and more racially and ethnically diverse than in previous generations. The gender dynamics also have changed over the course of the past 50 years, with more women serving in the military – and as ranking officers – in 2017 than ever before.

These demographic changes in the active forces also have been reshaping the profile of the veteran population. (For more, see our new report on veterans, “The American Veteran Experience and the Post-9/11 Generation.”)

The overall size of the U.S. military has been on a downward trajectory for several decades. Some of the declines in military participation that followed the Cold War and Gulf War were halted with the 9/11 terrorist attacks. Later, conflicts in Iraq and Afghanistan increased the overall size of the military.

In 2017, there were roughly 1.34 million men and women serving on active duty. This number is down from a recent high of 1.46 million in 2010 and down substantially from more than 2 million active duty service members in 1990.

In 2017, women represented 16% of the overall active duty force, up from 9% in 1980 and just 1% in 1970.

The percentage of officers who are women has steadily grown since the 1970s. For example, in 1975, 5% of commissioned officers were women, and, by 2017, that share had risen to 18%.

A look at the racial and ethnic profile of active duty service members shows that while the majority of the military is non-Hispanic white, black and Hispanic adults represent sizable and growing shares of the armed forces. In 2017, 57% of U.S. servicemembers were white, 16% were black and 16% were Hispanic. Some 4% of all active duty personnel were Asian and an additional 6% identified as “other” or unknown.

The share of racial and ethnic minorities in the military has grown steadily in recent decades. Hispanics, in particular, are the fastest growing minority population in the military – a shift that aligns with larger demographic trends in the United States.

In 2004, 36% of active duty military were black, Hispanic, Asian or some other racial or ethnic group. Black service members made up about half of all racial and ethnic minorities at that time.

By 2045, most veterans will have served after 9/11

By 2017, the share of active duty military who were non-Hispanic white had fallen, while racial and ethnic minorities made up 43% – and within that group, blacks dropped from 51% in 2004 to 39% in 2017 just as the share of Hispanics rose from 25% to 36%.

Today’s military is comprised of service members who served during a wide range of eras, from World War II to the post-9/11 conflicts. But the share who served in pre-9/11 eras will dwindle in future decades.

In 2015, the largest share of veterans first served during the Vietnam era (33%). Projections from the Department of Veterans Affairs show the waning influence of veterans from the World War II, Korean War and Vietnam eras. By 2045, the largest share of living veterans will have first served in the post-9/11 Gulf War era (35%).

Amanda Barroso  is a former writer/editor focusing on social trends at Pew Research Center.