1.A military campaign denotes the time during which a given military force conducts combat operations in a given area (often referred to as AO, area of operation). A military campaign may be executed by either a single Armed Service, or as a combined services campaign conducted by land, naval, air, cyber and space forces.
Facts. 1  Tall marigolds are sometimes labeled African marigolds, and the dwarf kinds are often called French marigolds. 2  Tall marigolds (Tagetes erecta) grow anywhere from 15 inches to 4 feet tall with blooms that can reach up to 5 inches across.
Whether the subject is marigolds or maple trees, the spacing largely depends on the plantâs mature size. According to Dr. Douglas Bailey at North Carolina State University, annuals such as ageratum, lobelia, pansies, dwarf French marigolds, and sweet alyssum should be spaced six inches apart.