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.
These are French marigolds and African marigolds. African marigolds are the larger of the two. African marigolds, Tagetes erecta, typically have large yellow to orange flowers that can measure as large as 5 inches across, with plant height varying an average of 10 to 36 inches tall.