A national anthem is generally a patriotic musical composition that evokes and eulogizes the history, traditions and struggles of its people, recognized either by a nation's government as the official national song, or by convention through use by the people.
A song, most broadly, is a single work of music that is typically intended to be sung by the human voice with distinct and fixed pitches and patterns using sound and silence and a variety of forms that often include the repetition of sections.
A government is the system by which a state or community is controlled.
US National Anthem 9/11/11 (New Zealand) by dinadangdong
The majority of national anthems are either marches or hymns in style.
A hymn is a type of song, usually religious, specifically written for the purpose of adoration or prayer, and typically addressed to a deity or deities, or to a prominent figure or personification.
Rascal Flatts perform national anthem by MLB
The countries of Latin America tend towards more operatic pieces, while a handful of countries use a simple fanfare.
A fanfare is a short musical flourish that is typically played by trumpets or other brass instruments, often accompanied by percussion, a "brief improvised introduction to an instrumental performance".
Opera is an art form in which singers and musicians perform a dramatic work combining text and musical score, usually in a theatrical setting.
Latin America is the group of countries and dependencies in the Americas where Romance languages are predominant.