The proper noun Calvary refers to the place near Jerusalem where Jesus was crucified. By extension, calvary (lower case) may refer to any experience involving great mental or physical pain.
The noun cavalry refers to a highly mobile army unit (originally troops who fought on horseback).
Examples:
- In John's Gospel, Mary is mentioned only twice, at Cana and at Calvary.
- The cavalry arrived at Bowling Green, and the next day the infantry was ordered to move to Nashville.
Practice:
(a) Roman Catholics believe that the mass represents what took place at _____.
(b) Isaac Botsford joined the _____ to participate more directly in the freeing of the slaves.

