1. The Great Fire of 1864: On February 10, 1864, a fire broke out in the city of Portland, Maine, that would go on to become one of the most devastating fires in American history. Over 1,800 buildings were destroyed and more than 10,000 people were left homeless.

2. Maine Ratification of the Constitution: On February 10, 1788, Maine became the 9th state to ratify the Constitution of the United States, which helped pave the way for the formation of the Union.

3. The HMS Bounty Arrives in Maine: The HMS Bounty, made famous by the mutiny that occurred on board in 1789, arrived in Maine on February 10, 1788, on its way back from a voyage to Tahiti.

4. Construction of the Penobscot Narrows Bridge: On February 10, 2004, the construction of the Penobscot Narrows Bridge in Maine began. The bridge, which spans the Penobscot River, is the tallest bridge in Maine and one of the tallest bridges in the United States.

5. Abolitionist Movement in Maine: On February 10, 1820, the Maine state legislature passed an act abolishing slavery within the state's borders. This was a major victory for the abolitionist movement and helped pave the way for the eventual abolition of slavery throughout the United States.