The TA's Medical Corps is taking over Astley Park in Chorley. The area will reverberate to the sound of enemy gunfire as its members evacuate a 'casualty' from a battlefield scene and provide emergency care in a field medical tent.
The Medical Corps hopes the demonstrations and information stands will encourage new members to sign up.
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Officers are appealing for information from the public to help trace a missing Warrington man.
Samuel Brown has today been jailed for 18 months for sexual offenses against a 15-year-old girl.
Emergency services are treating the incident as a suspected gas explosion at the moment. Two people are believed to be seriously injured.