Related Clues:

• Army outposts
• Stepped-on sacks
• Kids' snow creations
• Air Force outposts
• First, second, third and home
• Bliss in Texas et al.
• Baseball quartet
• Fortified military posts where troops are stationed
• Supporting layers
• Diamond quartet
• Military outposts
• First, second and third, but not fourth
• Defensive structures where troops are stationed
• GIs' places
• McHenry and Knox