Answer:
1. Settlement of Texas (1718)
2. Tyler leaves Democratic Party (1834)
3. Alamo falls to Santa Anna (1836, March)
4. Santa Anna defeated at San Jacinto (1836, April)
5. Harrison elected President (1840)
6. Tyler becomes President (1841)
7. Accident aboard the USS Princeton (1844, February)
8. Polk elected President (1844, November)
9. Annexation of Texas (1845)