diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 00000000..34234a53
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,4 @@
+[submodule "spot_ros2_ign"]
+	path = spot_ros2_ign
+	url = https://github.com/diyaagarwal21/spot_ros2_ign.git
+	branch = SpaceROS-Challenge
diff --git a/README.md b/README.md
index 47e3bd4b..e3c649ae 100644
--- a/README.md
+++ b/README.md
@@ -11,3 +11,8 @@ Submissions to this repo should include:
     - - See example here: https://github.com/space-ros/docker/blob/main/space_robots/run.sh
 
 Please refer to the [dockerfile repo](https://github.com/space-ros/docker/tree/main/space_robots) for instructions on running the existing demos
+
+______________________________
+
+## Changes made to Repository
+See ReadME in `spot_ros2_ign` package. The `spot_ros2_ign` submodule was added, an adaption of champ quadruped robot to ROS2 and Ignition Gazebo. Previously, the Boston Dynamics Spot robot was only simulated using ROS2 with Gazebo Classic, which goes end-of-life in January 2025. This package, modified from quadruped_ros2, simulates the Spot robot in Ignition Gazebo, a newer version of Gazebo. This combination of simulating the Spot robot with ROS2 and Ignition Gazebo on an open-source platform has not been done yet. This package also publishes an Rviz panel where the robot is visible and able to be controlled with its joints.
diff --git a/spot_ros2_ign b/spot_ros2_ign
new file mode 160000
index 00000000..ceab650d
--- /dev/null
+++ b/spot_ros2_ign
@@ -0,0 +1 @@
+Subproject commit ceab650d87f7cf2e2ef7614f446cd09a975b0eda