PHILADELPHIA — Cities large and small were preparing for major demonstrations Saturday across the U.S. against President Donald Trump, as officials urge calm, National Guard troops mobilize and Trump attends a military parade in Washington to mark the Army’s 250th anniversary.

“The most threatening sound to an oligarch is laughter.”

No Kings protests come on the heels of protests across the country over federal immigration enforcement raids that began last week and Trump ordering

Follow live updates as the military parade in Washington, D.C., kicks off on Trump's birthday. 'No Kings' protests by opponents are planned across the country today.

Before you let your voice be heard, advocacy and civil right groups stress the importance of being prepared before you go. And knowing your rights.

Far-right groups are humming with talk of potential violence ahead of massive “No Kings” Day demonstrations that are expected to attract millions of protesters Saturday, according to The Wall Street Journal.

Here's how to stay safe and what to know about your rights if you get arrested, detained or encounter tear gas during Houston's No Kings Day protest.