This is a short (23 page) booklet which I think is very worth a read.
Bodyhammer: Tactics and self-defense for the modern protester
Technology has changed the street protest. In centuries past, a mass of people wishing to express themselves could only be silenced by live gunfire. But the advent of riot armor, lachrymatory gases and “less-lethal” projectiles have allowed ruling establishments to squelch the voice of protesters with great ease, and even better PR.
It is the interest of this booklet to help preserve our freedoms of speech and public movement in expressing ourselves. The objective is not to ‘up the ante’ or encourage street battles. No one sets out to engage the police or the army. We are on the streets to be seen and heard, but find it ever more difficult as arrests and injuries from policing forces aim to shut our voices out of the general equation.
One benefit of our modern and wasteful mass consumption society is that it allows us to protect ourselves from these forces. We have the material and the means to defend our protests and to keep the police at a distance. Our method is self-defence. We march with a mission and should those in power order others to stop us, we have a right to defend our bodies as much as our message.
This book was written to help preserve the freedom of movement and assembly.
Part 1: Shield varieties and construction
Part 2: Shield employment
Part 3: Shield varieties, their construction, and other equipment
Part 4: Group movement situations
Part 5: Shield wall formations and tactics