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Texas in the USA (1845-1861, 1865-Present)
United States flag.

Texas became the 28th star on the U.S. flag when it joined the Union in 1845. On rejoining the Union after the Civil War and Reconstruction, the "Star Spangled Banner" resumed its place as the national flag of Texas. The Lone Star emblem from the days of the Republic of Texas remains the state flag.

Source: Lonestar Junction; Texas Handbook Online. (full source)