The Iron Cross (Eiserne Kreuz) is a German and Prussian military symbol and decoration medal. Its design consists of a black cross pattée with white outline. Its use continues within the Bundeswehr service (after 1956).
Several video games like WWII-themed shooters, Kantai Collection and Azur Lane will use Iron Crosses to substitute the swastika in order to comply with censorship and avoid offending their audience with Nazi symbolism.
This tag implicates cross (learn more).