<ItemsControl Name="itemsControl">

    <ItemsControl.ItemsPanel>
        <ItemsPanelTemplate>
            <UniformGrid Rows="16" Columns="16" Width="{Binding RelativeSource={RelativeSource Self}, Path=ActualHeight}" HorizontalAlignment="Left" />
        </ItemsPanelTemplate>
    </ItemsControl.ItemsPanel>

    <ItemsControl.ItemTemplate>
        <DataTemplate>
            <Button Background="{Binding ., Converter={StaticResource IntToFillConverter}}" Command="{Binding Command_Selected_Cell}">
                <Button.CommandParameter>
                    <MultiBinding Converter="{StaticResource MyMultiBindingConverter}">
                        <!-- Position x -->
                        <Binding Path="?????"/>
                        <!-- Position y -->
                        <Binding Path="?????"/>
                    </MultiBinding>
                </Button.CommandParameter>
            </Button>
        </DataTemplate>
    </ItemsControl.ItemTemplate>

</ItemsControl>

public PlateauCombatPage()
    {
        InitializeComponent();
        MyCollection = new ObservableCollection<int>();

        MyCollection.Add(0);
        [...]
        MyCollection.Add(1);

        itemsControl.ItemsSource = MyCollection;
    }