WASHINGTON — Schools, target ranges, and maintenance facilities are among $3.6 billion in military base projects to be cut by President Trump to pay for 175 miles of fencing along the US-Mexico border, stoking the ire of Capitol Hill Democrats, who promise they won’t replace the money needed to revive the projects.

Projects in 23 states, 19 countries, and three US territories would be stalled or killed by the move, though just $1.1 billion in cuts would strike the continental United States, according to a list released Wednesday by the Pentagon. Almost $700 million would come from projects in US territories, with another $1.8 billion coming from projects on overseas bases.

Trump’s move would take the biggest step yet in delivering on his longstanding promise to build a wall to block immigrants from entering the country illegally. But that may come at the expense of projects that the Pentagon acknowledged may be difficult to fund anew.

A senior defense official told reporters the Pentagon is having conversations with members of Congress to urge them to restore the funding. The official agreed that the department has ‘‘a lot of work ahead of us,’’ considering that Congress has given no guarantee it will provide money for the defunded projects. The official was not authorized to discuss the details publicly so spoke on condition of anonymity.

In addition, new stretches of fencing proposed along the Rio Grande and through a wildlife refuge in Arizona promise to ignite legal battles that could delay the wall projects as well.

Military base projects facing the chopping block tend to address less urgent needs like new parking at the US Military Academy at West Point, N.Y., and a variety of small arms ranges at bases in Wisconsin and Oklahoma. But a ‘‘cyber ops facility’’ in Hampton, Va., and an expanded missile defense field at Fort Greeley, Alaska, face the ax, too.

Trump has so far succeeded in building replacement barriers within the 654 miles of fencing built during the Obama and Bush administrations. The funding shift will allow for about 115 miles of new pedestrian fencing in areas where there isn’t any now.

‘‘The wall is being built. It’s going up rapidly,’’ Trump said Wednesday. ‘‘And we think by the end of next year, which will be sometime right after the election actually, but we think we’re going to have close to 500 miles of wall, which will be complete.’’

New stretches of fencing are sure to spark legal battles with angry landowners and environmentalists. The Pentagon plan also fuels the persistent controversy between the Trump administration and Congress over immigration policies and the funding of the border wall.

‘‘It doesn’t take any input from the local communities. It will take away from the private property rights,’’ said Representative Henry Cuellar, Democrat of Texas. ‘‘We are going to do everything we can to stop the president.’’

Cuellar suggested Democrats will look at a must-pass funding bill this month — required to prevent a government shutdown Oct. 1 — to try to take on Trump. But a more likely venue for the battle could be ongoing House-Senate negotiations over the annual Pentagon policy measure.

Lawmakers who refused earlier this year to approve nearly $6 billion for the wall must now decide if they will restore the projects that are being used to provide the money.

‘‘To pay for his xenophobic border wall boondoggle, President Trump is about to weaken our national security by stealing billions of dollars from our military,’’ said Representative Debbie Wasserman Schultz, a Florida Democrat, who chairs a key military construction panel. ‘‘The House of Representatives will not backfill any projects he steals from today.’’

One of the Senate’s most endangered Republicans in the 2020 election, Arizona Senator Martha McSally, reported that her state is getting nicked for just $30 million from a project that was being delayed anyway. Georgia, where two potentially competitive Senate races loom next year, would be spared entirely, though powerful Senate majority leader Mitch McConnell, Republican of Kentucky, himself facing reelection, would lose a $63 million middle school at Fort Campbell.

‘‘We need to secure our border and protect our military; we can and should do both,’’ McSally said. ‘‘I went to the mat to fight for Arizona projects and succeeded.’’

Elaine McCusker, the Pentagon comptroller, said the now-unfunded projects are not being canceled. Instead, the Pentagon is saying the military projects are being ‘‘deferred.’’

Congress approved $1.375 billion for wall construction in this year’s budget, same as the previous year and far less than the $5.7 billion that the White House sought. Trump grudgingly accepted the money to end a 35-day government shutdown in February but simultaneously declared a national emergency to take money from other government accounts, identifying up to $8.1 billion for wall construction.

The transferred funds include $600 million from the Treasury Department’s asset forfeiture fund, $2.5 billion from Defense Department counterdrug activities, and now the $3.6 billion pot for military housing construction announced Tuesday.

The 175 miles covered by the Pentagon funding represents just a fraction of the 1,954-mile US-Mexico border.