20th century 41,866 View Records 19th century 22,635 View Records 18th century 11,361 View Records 1945- 7,604 View Records Revolution, 1775-1783 6,683 View Records Civil War, 1861-1865 6,064 View Records 21st century 6,010 View Records 17th century 5,369 View Records 16th century 3,425 View Records Revolution, 1789-1799 3,216 View Records Colonial period, ca. 1600-1775 2,973 View Records 1989- 2,678 View Records 1945-1989 2,667 View Records 1775-1865 2,637 View Records 1933-1945 2,139 View Records War of 1812 2,025 View Records To 1500 1,938 View Records 1775-1783 1,707 View Records 1918-1945 1,670 View Records 1900-1999 1,585 View Records 1991- 1,503 View Records 1960- 1,497 View Records 1998- 1,484 View Records To 1775 1,406 View Records 1980- 1,339 View Records 1966-1998 1,329 View Records 1809-1865 1,147 View Records 1760-1789 1,146 View Records 1946- 1,140 View Records 1951- 1,138 View Records 1564-1616 1,136 View Records Early modern, 1500-1700 1,118 View Records 1947- 1,104 View Records 1948- 1,051 View Records 1993- 1,030 View Records 1861-1865 1,021 View Records 2001- 1,008 View Records 1997- 949 View Records 1837-1901 922 View Records 1949- 909 View Records 1988- 881 View Records 1975- 879 View Records 1732-1799 872 View Records 2009- 822 View Records 1918- 787 View Records 1783-1865 786 View Records 1981- 770 View Records 1917- 763 View Records 1727-1760 755 View Records To 1789 750 View Records 1976- 723 View Records 1789-1871 718 View Records Revolution, 1917-1921 710 View Records 2001-2009 698 View Records 1979- 696 View Records 1789-1815 688 View Records To 1865 671 View Records 1990- 660 View Records 1760-1820 643 View Records 1865-1950 642 View Records 1981-1989 635 View Records 1688-1815 627 View Records 2000- 619 View Records 1900 - 1999 610 View Records 2000-2099 609 View Records 1801-1809 592 View Records 1986- 591 View Records 1800-1837 588 View Records Cretaceous 588 View Records French and Indian War, 1755-1763 581 View Records 20e siècle 555 View Records 1950-1966 553 View Records 1066-1485 552 View Records To 1800 549 View Records 1743-1826 545 View Records 1767-1845 535 View Records 1760-1860 533 View Records 1960-1980 532 View Records 1815-1861 530 View Records 1918-1933 524 View Records 1970- 516 View Records Middle Ages, 600-1500 513 View Records Civil war 512 View Records 1789-1799 509 View Records Revolution 508 View Records 1976-2000 504 View Records 1985-1991 499 View Records 1800-1899 488 View Records 1865-1918 482 View Records 1945-1953 480 View Records 1971-1981 480 View Records 1966-1997 477 View Records 1830-1837 474 View Records 1789-1900 472 View Records British occupation, 1765-1947 471 View Records 1789-1820 463 View Records Civil War, 1642-1649 463 View Records 1981-1993 460 View Records Revolution, 1945-1949 456 View Records 1952- 452 View Records