What is the summary and analysis of the poet american liberty by philip freneau

Let America rejoice, thy standard rear, 
Let the loud trumpet animate to war: 
Thy guardian Genius, haste thee on thy way, 
To strike whole hosts with terror and dismay. 
Happy some land, which all for freedom gave, 
Happier the men whom their own virtues save; 
Thrice happy we who long attacks have stood, 
And swam to Liberty thro’ seas of blood; 
The time shall come when strangers rule no more, 
Nor cruel mandates vex from Britain’s shore: 
When Commerce shall extend her short’ned wing. 
And her free freights from every climate bring; 
When mighty towns shall flourish free and great. 
Vast their dominion, opulent their state: 
When one vast cultivated region teems, 
From ocean’s edge to Mississippi’s streams; 
While each enjoys his vineyard’s peaceful shade, 
And even the meanest has no cause to dread; 
Such is the life our foes with envy see, 
Such is the godlike glory to be free.