There are several ways to protect yourself during war:
to protect themselves
To protect soldiers during war and crusades
ummm. FIGURE IT OUT YOURSELF
Baltimore, Maryland.
air raid shelters
Building fortifications, foxholes, walls natural terrain and there was body armor available.
stay indoors
*hot not got
you dont you die
move to another ecosystem
to protect themselves
To protect soldiers during war and crusades
mostly go to high elevation or buildings
don't panic
Australia .
You can get under a table so that debris would not hit your head
In most cases in Britain there was no way to protect homes.