# Action
<a name="API_Action"></a>

The action that starts at the beginning of an incident. The response plan defines the action.

## Contents
<a name="API_Action_Contents"></a>

**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** ssmAutomation **   <a name="IncidentManager-Type-Action-ssmAutomation"></a>
The Systems Manager automation document to start as the runbook at the beginning of the incident.  
Type: [SsmAutomation](API_SsmAutomation.md) object  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ssm-incidents-2018-05-10/Action) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ssm-incidents-2018-05-10/Action) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ssm-incidents-2018-05-10/Action)