| 1830 | Mexico attempts to halt American migration to Texas |
| 1845 | Mass immigration from Europe begins |
| 1880 | Polish National Alliance formed to help Polish immigrants adjust to life in America |
| 1894 | Immigration Restriction League formed to limit immigration from southern and eastern Europe |
| 1917 | Congress passes law requiring literacy test for all immigrants |
| 1921 | Congress enacts quotas for European immigrants |