President Trump is hosting a parade celebrating the 250th anniversary of the U.S. Army on Saturday, bringing tanks and soldiers to the streets of Washington, D.C., for the capital's first major military parade in more than three decades.

The largest is expected to take place in Portland, where at least five separate demonstrations are planned in and outside of downtown. Two downtown events will happen on Naito Parkway. One will gather at the Salmon Street Springs and another will form at the Battleship Oregon Memorial in Tom McCall Waterfront Park.

As a military parade rolls through Washington, DC, on Saturday – President Donald Trump’s birthday – millions of Americans are expected to protest in what organizers predict will be the strongest display of opposition to Trump’s administration since he took office in January.

A military parade​ through the streets of Washington, D.C., celebrates the U.S. Army's 250th anniversary on Saturday, June 14. These maps show the route.

President Donald Trump on Saturday is set to host a major military parade in Washington, celebrating the Army’s 250th anniversary and Flag Day.

The National Weather Service issued a broad “marginal” risk for excessive rainfall on Saturday, the lowest level on its four-tier scale, for much of the eastern third of the country through the weekend. A slightly higher risk was forecast for parts of Kansas, Oklahoma and Virginia. .

More than a hundred Army tanks and other vehicles will roll through Washington streets and 62 aircraft will buzz overhead to honor the Army’s milestone. One unknown is the weather. Rain is in the forecast,