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.
Spacing depends on species of marigold; space large varieties 18 to 24 inches apart, medium varieties 12 to 15 inches apart and dwarf species 6 inches apart. Marigolds prefer soil with a pH of 6.0 to 7.0 enriched with organic matter, but the plant can tolerate dry soils.