World War I

 Airmen of the Lafayette Escadrille
[The Lafayette Escadrille was composed of volunteer American
airmen before the official entry of America into the war.]
  
 All Saints. A crowd of Parisians come to lay flowers on the graves of soldiers.
  
 French Front. Frontline trench
  
 In the Somme. A French regiment reinforces the English lines
  
On the Serbian front. Serbian irregulars used to 
transport ammunition, supervised by regulars
 

 Airmen of the Lafayette Escadrille
[The Lafayette Escadrille was composed of volunteer American
airmen before the official entry of America into the war.]
  
 All Saints. A crowd of Parisians come to lay flowers on the graves of soldiers.
  
 French Front. Frontline trench
  
 In the Somme. A French regiment reinforces the English lines
  
On the Serbian front. Serbian irregulars used to 
transport ammunition, supervised by regulars