250 years ago today, on June 29, 1776, New Yorkers looked out at the water and saw a nightmare on the horizon. The British fleet had arrived, and so many ships filled the bay that witnesses said the masts looked like "a forest of pine trees" growing out of the sea. The timing could not have been more brutal. This was the empire's answer to the rebellion, and it was overwhelming. The first wave of around 45 warships and transports dropped anchor off Sandy Hook and Staten Island carrying General William Howe and roughly 10,000 troops. Within days it kept growing. Then his brother Admiral Richard Howe arrived with more. It would eventually swell into one of the largest seaborne invasion forces of the entire 18th century, hundreds of ships and tens of thousands of professional soldiers and German mercenaries, aimed at one city. Now sit with the timing. While that forest of masts was filling the harbor, delegates down in Philadelphia were in the final days of debating whether to declare independence. They voted for it on July 2 and signed off on the wording on July 4. So at the exact moment America was being born on paper, the most powerful military on earth was already anchored off its coast, getting ready to strangle it in the cradle. The people of New York understood exactly what they were seeing. Alarm bells rang, panic spread through the streets, and soldiers sprinted to their posts to stare at a force they had almost no hope of matching. Washington's army was outnumbered, outgunned, and about to get badly beaten in the battles for New York that followed. That's the part that gets lost in the fireworks every Fourth of July. Independence wasn't declared from a position of strength. It was declared with an enemy armada already sitting on the doorstep, knowing full well what was coming. They signed their names anyway.

The most influential immigrant group in American history is the one nobody argues about, because almost nobody remembers it was them. Start at the beginning. The Continental Army was a half-trained mess until Baron von Steuben, a Prussian officer, showed up at Valley Forge and drilled it into a real fighting force. The freedom of the press you take for granted traces back to John Peter Zenger, a German immigrant printer whose 1735 trial established that you can't be jailed for printing the truth. German-Americans were shaping this country before there was a country. Then look around your own life. Your Christmas tree is German. The hot dog (Frankfurt), the hamburger (Hamburg), the pretzel, the delicatessen, all German. Kindergarten is German, the word and the idea, brought over and opened by Margarethe Schurz. Blue jeans came from Levi Strauss of Bavaria. Heinz ketchup, Steinway pianos, Oscar Mayer, and the big four beers, Budweiser, Pabst, Miller and Schlitz, were every one founded by German immigrants. The Brooklyn Bridge was engineered by John Roebling, born in Prussia. The Santa Claus you picture every December, plus the Republican elephant, were drawn by Thomas Nast, a German immigrant. Pfizer was founded by Charles Pfizer, who arrived from Germany in 1848. Boeing was built by the son of a German immigrant. John Jacob Astor showed up from Germany with next to nothing and became America's first multimillionaire. Charles Steinmetz, a disabled immigrant nearly turned away at the border, went on to make modern electrical power possible. And it kept going. Wernher von Braun designed the rocket that put America on the moon. Einstein was German. Carl Schurz, a refugee, became a Union general and the first German-born US Senator. Eisenhower commanded D-Day and won the White House under a name once spelled Eisenhauer. Babe Ruth was a German-American kid from Baltimore. Here is the kicker. German is the single largest ancestry group in the entire United States, around 44 million people, bigger than Irish, English or Italian. The biggest thread in the whole American fabric, and somehow the quietest. They never asked for parades. They just trained the army, freed the press, engineered the bridges, founded the companies, built the rockets and lit up the Christmas mornings, then blended in so completely you forgot they were ever the "other." That might be the most American story there is.