How to build a project of projects in maven?

Question

Java

Hello. Help, please, to solve a problem.
I want to divide a large project (MVC + SOAP) into services.
Main pom-nickname

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.ChatRoom</groupId>
    <artifactId>ChatRoom</artifactId>
    <packaging>pom</packaging>
    <version>1.0</version>
    <name>ChatRoom Maven Webapp</name>
    <url>http://maven.apache.org</url>

    <modules>
        <module>soapService</module>
        <module>portalService</module>
    </modules>

</project>

SAOP

<groupId>com.SOAP</groupId>
    <artifactId>SOAP</artifactId>
    <version>1.0</version>
    <packaging>jar</packaging>
    <name>SOAP</name>
    <description>SOAP service</description>

    <parent>
        <groupId>com.ChatRoom</groupId>
        <artifactId>ChatRoom</artifactId>
        <version>1.0</version>
        <relativePath>../pom.xml</relativePath>
    </parent>
...

 <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <version>3.0</version>
                <configuration>
                    <source>1.8</source>
                    <target>1.8</target>
                    <compilerArgument>-Xlint:all</compilerArgument>
                    <showWarnings>true</showWarnings>
                    <showDeprecation>true</showDeprecation>
                </configuration>
            </plugin>

Likewise for MVC.
Everything is powered by Spring. What needs to be specified to maven so that it can collect two subprojects into one varnik and deploy it to tomcat. Or he would create a varnik for the project and at the same time would make them.

Answer 1

Make another project, and add the rest of the project to it as dependencies in<dependencies>

Answer 2

You can try EAR .
I warn you, this is a "bloody enterprise"!