Since EHV-1 is a common virus in horses, it is recommended that all horses be vaccinated at least once a year. For horses congregating at shows and competitions, more frequent vaccinations may be recommended.
Enfilade and defilade. Enfilade and defilade are concepts in military tactics used to describe a military formation's exposure to enemy fire. A formation or position is in enfilade if weapons fire can be directed along its longest axis.
A glacis (/ËÉ¡leÉª.sÉªs/ ; [É¡lasi]) in military engineering is an artificial slope as part of a medieval castle or in early modern fortresses. They may be constructed of earth as a temporary structure or of stone in more permanent structure. A glacis plate is the sloped front-most section of the hull of a tank or other armored fighting vehicle. More generally, the term glacis can denote any slope, natural or artificial, which fulfils the above requirements.