Washington D.C. erupts in patriotic fervor as news spreads of America's declaration of war against Mexico. The Daily Union leads with coverage of a massive rally in New York City's Park, where between 20,000 and 25,000 citizens gathered to hear speeches and pass resolutions supporting President Polk's call for 90,000 volunteers. The crowd was so densely packed that the "immense multitude" became "an almost immoveable and closely wedged expanse." Mayor Andrew H. Mickle presided over the meeting, which featured an original national anthem composed by General G.P. Morris titled "God Has Made Us Free!" The assembled throng—drawing prominent New Yorkers like William Paulding, Isaac Varian, and Hamilton Fish—overwhelmingly endorsed war resolutions, pledging their "lives and fortunes" to the cause. The resolutions condemned Mexico's "aggravated and multiplied wrongs" stretching back years and framed the conflict as a righteous defense of American soil and national honor.

May 1846 marks the beginning of the Mexican-American War, one of the most consequential conflicts in American history. The war would result in the United States acquiring nearly half of Mexico's territory—present-day California, Nevada, Utah, most of Arizona and New Mexico, and parts of Colorado and Wyoming. This expansion reignited the simmering national crisis over slavery: would these new territories be free or slave states? The war deepened sectoral divisions that would explode into civil war just 15 years later. For contemporaries like those New Yorkers, however, the war felt like a clear moral imperative—a chance to punish Mexican aggression and expand American influence. The gathering itself reveals how effectively political leaders mobilized public opinion for war, transcending party divisions and invoking patriotic unity.

• Dr. Marcus C. Buck's estate auction featured "an excellent two-story brick building, with basement and garret" fronting the Mall between 10th and 11th Streets West—this valuable property was being liquidated while the war drums beat and national attention focused on Mexico.
• Wheeler's Toothberry Tooth Wash promised to cure toothache in ONE MINUTE and was available at Fish & Co. at Brown's Hotel, with the principal U.S. office at 59 Chestnut Street, Philadelphia—evidence that patent medicines and bold advertising claims were thriving even in war times.
• The newspaper lists over 30 vice presidents for the New York war rally, including names like Jacob Astor, William B. Cozzens, and Philip Hone—essentially a who's-who of Manhattan's merchant and civic elite, showing how thoroughly the war unified the city's power structure.
• Multiple household furniture auctions dominate the classified section, suggesting Washington D.C. residents were liquidating belongings—possibly relocating due to wartime uncertainty or economic disruption.
• The paper emphasizes disputes over American jurisdiction in Oregon in a side article, showing the war with Mexico was simultaneous with tension over the Oregon Territory's border with Britain—America was gambling on two territorial fronts at once.

• The rally's organizers chose Mayor Andrew H. Mickle as president of the meeting—Mickle would serve as NYC mayor during the turbulent 1840s-50s, a period when the city became a flashpoint for both abolitionist and pro-slavery sentiment tied directly to territorial gains from this very war.
• General G.P. Morris, who composed "God Has Made Us Free!" for the occasion, was a prominent editor and poet of his day whose patriotic verse resonated with the crowd 'as the strange and stirring symphony of waves of the great sea'—yet within a decade, the question of what 'free' actually meant in territories won from Mexico would tear the nation apart.
• The war resolution specifically mentions Congress authorizing 90,000 volunteers—the actual Mexican-American War would ultimately involve far fewer troops (about 13,000 at peak), but the ambitious target shows how confident Americans felt about swift victory. The war dragged on until 1848.
• Hamilton Fish, listed as a vice president of this New York rally, would go on to become Secretary of State under Ulysses S. Grant and would be remembered as one of the most respected diplomats of the post-Civil War era—shaped by the very expansionist fervor he's endorsing here.
• The page's casual references to buying and selling Washington D.C. real estate, combined with the war coverage, occurred just as the question of whether the nation's capital would remain in a slave state was becoming politically fraught. The territorial gains from this war would make that question explosive.