It will attempt to persuade teachers to address the subject within the new citizenship curriculum.
The charity is planning to publicise a report into how the conflicts in Iraq, Afghanistan and the former Yugoslavia have affected children in those countries.
'We want UK children to know that some of the decisions made by their country have dangerous outcomes for children around the world,' said War Child PR manager Julian Carrera.
'We want them to understand that children should never be victims of conflict, regardless of the justification for war,' he added.
The charity will also publicise the views of British secondary school children on conflict and its consequences for children.
The campaign, Your War is Not With Me, will launch on 4 June to coincide with the UN's International Day of Innocent Children Victims of Aggression.
It will argue that children are 'too often ignored' in establishing an end to conflict and that 'their voices go unheard' when post-war strategies are created.
Educational media will be sent details of how the report and its implications can be used to educate children about war in lessons and school assemblies.
National and regional broadcast and print media will also be targeted.
The charity is using support from Channel 4 News presenter Jon Snow and Secondary Heads Association general-secretary John Dunford in an effort to generate publicity.