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.
The appropriate spacing for marigolds depends on the mature size of the plant. French marigolds (Tagetes patula) are smaller plants and can be spaced 6 to 9 inches apart. The larger African marigolds (Tagetes erecta) need around 18 inches of space between plants.