Get war module when running the parent maven project - maven

Question

Is there a way to run a war module automatically when I run the parent project?
To make it clear, I did three separate maven project (db, core and presentation), then I made a parent project which include the 3 projects mentioned before.
I'd like to get the presentation module running when I run the parent project.
Also, I want to know if it's possible to save the hole work from the parent project to my git account.
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.project.xxxxxxx</groupId>
<artifactId>parent-project</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>
<name>parent-project</name>
<url>http://maven.apache.org</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<targetJdk>1.7</targetJdk>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.0</version>
<configuration>
<port>8080</port>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>${targetJdk}</source>
<target>${targetJdk}</target>
<showDeprecation>true</showDeprecation>
</configuration>
</plugin>
</plugins>
</build>
<modules>
<module>../project-db</module>
<module>../project-core</module>
<module>../project-presentation</module>
</modules>
<dependencies>
</dependencies>
</project>

Answer 1

You need to specify the sub-project under tag.
You may refer http://books.sonatype.com/mvnex-book/reference/multimodule-sect-simple-parent.html for example

Answer 2

Your modules should be unter your parent in the file structure. Like
parent-project
pom.xml
project-db
pom.xml
project-core
pom.xml
project-presentation
pom.xml
Then you have to change the parent pom:
<modules>
<module>project-db</module>
<module>project-core</module>
<module>project-presentation</module>
</modules>