Is the funeral prayer performed for Muslims killed in battles with infidels?

A martyr is a Muslim who dies fighting disbelievers. The majority of scholars hold that the funeral prayer (Salat al-Janazah) should not be offered for him. This is the view of Imam Malik and Al-Shafi'i, and it is the sounder of the two narrations from Ahmad. Their evidence for this is that the Prophet (peace and blessings be upon him) did not offer the funeral prayer for the martyrs of Uhud. Furthermore, the wisdom behind the funeral prayer is intercession, and a martyr has all his sins expiated except for debt.

Some scholars are of the opinion that it is permissible to offer the funeral prayer for a martyr (though it is not obligatory). This is a narration from Imam Ahmad. They base their argument on hadiths that mention the Prophet (peace and blessings be upon him) offering the funeral prayer for some martyrs. Among those who chose this view is Sheikh Al-Albani.