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| 49th Parallel Polk, James Knox |  |
| 15th June 49th Parallel The treaty of Washington declares the 49th Parallel boundary at Canada & Oregon |
| Battle of Monterey Davis, Jefferson | |
| 21st Sep Monterey Commands a successful charge at Monterey winning a victory in the assault on Fort Teneria |
| Battle of Palo Alto Taylor, Zacharay | |
| 8th Mar Palo Alto Defeats the Mexicans |
| Battle of Resca de la Palma Taylor, Zacharay | |
| 9th May Resca d'Palma Defeats the Mexicans |
| Blockade of Rio Grande Edson, Alvin | |
| Rio Grande Forms a marine battalion which blockades the Rio Grande |
| Border Canada Polk, James Knox | |
| 15th June 49th Parallel The treaty of Washington declares the 49th Parallel boundary at Canada & Oregon |
| Border USA Polk, James Knox | |
| 15th June 49th Parallel The treaty of Washington declares the 49th Parallel boundary at Canada & Oregon |
| Capture of New Mexico Polk, James Knox | |
| 12th April Rio Grande Negotiations breakdown for the purchase of New Mexico |
| 12th April Rio Grande Orders USAtroops into the Rio Grande to acquire California for the Union |
| Capture of Saltillo Taylor, Zacharay | |
| 16th Nov Saltillo Captures Saltillo |
| Capture of Tampico Edson, Alvin | |
| 14th Nov Tampico Capures Tampico |
| Declaration of War Polk, James Knox | |
| 13th May Formal declaration of war against Mexico |
| Invasion of Mexico Polk, James Knox | |
| 12th April Rio Grande Orders USAtroops into the Rio Grande to acquire California for the Union |
| Invasion of Mexico Scott, Winfield | |
| Tampico Mounts an invasion of Mexico from Tampico |
| Invasion of Teaxas Taylor, Zacharay | |
| Texas Occupies Texas , starts the war with Mexico |
| Migration Utah Young, Brigham | |
| Utah Leads a migration to Utah |
| Mormon Church Young, Brigham | |
| 30th June Salt Lake City The Mormons leave Nauvoo City on the trail for Salt Lake City |
| Resignation of Davis Davis, Jefferson | |
| Davis resigns his seat in Congress |
| Rule of Oregon Polk, James Knox | |
| 23rd April Oregon The USASenate resolves to end the British occupation of Oregon |
| Salt Lake City Young, Brigham | |
| Salt Lake City Founds Salt Lake City |
| Siege of Bautista Edson, Alvin | |
| Bautista Carries out a succesful raid of the port of San Juan Bautista |
| Siege of Fort Teneria Davis, Jefferson | |
| 21st Sep Teneria Commands a successful charge at Monterey winning a victory in the assault on Fort Teneria |
| Siege of Frontera Edson, Alvin | |
| Frontera Carries out a succesful raid of the port of Frontera |
| Treaty of Washington Polk, James Knox | |
| 15th June 49th Parallel The treaty of Washington declares the 49th Parallel boundary at Canada & Oregon |
| 15th June Oregon The treaty of Washington declares the 49th Parallel boundary at Canada & Oregon |