Statistics for occurrence #1 of “Fort Clark” in chapter 3 of D. H. Hill, Jr., Confederate Military History, a library of Confederate States Military History: Volume 4, North Carolina:

... 580 men. On the second day the Ellis landed some reinforcements, raising the number to 718. The post was commanded by Maj. W. S. G. Andrews. These forces were divided between Fort Hatteras and Fort Clark , which were about three-quarters of a mile apart Fort Hatteras—the position of which was so good that the enemy's engineer officer said after its capture, With guns of long range it can success...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
Fort Clark (North Dakota, United States) 0 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.