| pre- 1715 | 
 Native Peoples 
 | 
| 
   
1715-1790 
 | 
   
Arrival of European Explorers and Traders 
 | 
| 1729 | 
Wett Work tract patented by John Abbington | 
| 1730 | 
Urbana and the surrounding area settled | 
| 1740 | 
Locust Level tract patented by Daniel Dulaney | 
| 1745 | 
Town of Frederick established | 
| ca. 1748 | 
Middle Ford Ferry crossing established over the Monocacy River | 
| ca. 1780 | 
James Marshall builds the main house on Wett Work (today's Thomas Farm) | 
| 
   
1790-1860 
 | 
   
The Post-Revolutionary War Era 
 | 
| ca. 1794 | 
Earliest portion of main house on L'Hermitage (today's Best Farm) constructed | 
| 1805 | 
Georgetown Pike chartered by state of Maryland | 
| 1827 | 
John Brien purchased L'Hermitage from the Vincendières | 
| 1831 | 
Baltimore & Ohio Railroad completed to Monocacy Junction. | 
| 1848 | 
The Georgetown Pike was macadamized. | 
| ca. 1852 | 
Griffin Taylor builds the brick farmhouse on Clifton (today's Worthington Farm) | 
| 
   
1860-1890 
 | 
   
Civil War and Reconstruction 
 | 
| 1860 | 
John T. Worthington purchases Clifton farm | 
| 1862-1863 | 
Two blockhouses built by the Union Army to guard the railroad and the turnpike bridge over the Monocacy River  | 
| 1864 | 
July 9, the Battle of Monocacy is fought | 
| ca. 1872 | 
The Gambrills build the Edgewood mansion | 
| 
   
1890-1934 
 | 
   
Commemoration and Memorialization 
 | 
| 1907 | 
New Jersey Monument dedicated | 
| 1908 | 
Pennsylvania Monument dedicated | 
| 1914 | 
UDC Monument dedicated; the Geisbert family purchases the Baker Farm | 
| 1915 | 
Vermont Monument dedicated | 
| 
   
1934-Present   
 | 
   
Establishment and Development of the National Battlefield 
 | 
| 1934 | 
Monocacy National Military Park authorized by an act of Congress, but no funds are appropriated for land purchase | 
| 1950-1952 | 
U.S. 240 (today's Interstate 270) constructed | 
| 1964 | 
Maryland Monument constructed; centennial of battle commemorated. | 
| 1973 | 
Battlefield designated as a National Historic Landmark | 
| 1975 | 
Battlefield placed on the National Register of Historic Places | 
| 1976 | 
Name changed to Monocacy National Battlefield; funds are appropriated for land acquisition | 
| 1991 | 
Visitor center established at Gambrill Mill as park opens to the public on July 13 | 
| 1981-2001 | 
National Park Service purchases six component properties that comprise the park | 
| 2001-2010 | 
Archeological and historic research projects are conducted to investigate park resources  | 
| 2006 | 
Ground is broken for a new visitor center. | 
| 2007 | 
 The new Monocacy National Battlefield Visitor Center opens on June 27, 2007. 
 | 
| 2010 | 
Slave Village Discovered at Best Farm |